A train of length 200 m crosses an electric pole in 10 seconds find the speed of train in km/h

Speed of train will help us to calculate different types of problems on motion.

1. When a train passes a stationary object:

Let x be the length of the train which includes the engine also. When the end of the train passes the object, then the engine of the train has to move a distance equal to the train.

Then the time taken by the train to pass the stationary object = length of the train/speed of the train

2. When a train passes a stationary object having some length:

When the end of the train passes the stationary object having some length, then the engine of the train has to move a distance equal to the sum of the length of the train and stationary object.

Then the time taken by the train to pass the stationary object = (length of the train + length of the stationary object)/speed of the train

Problems to calculate the motion or speed of train:

1. Find the time taken by a train 150 m long, running at a speed of 90 km/hr in crossing the pole.

Solution:            

Length of the train = 150m

Speed of the train = 90 km/hr

                         = 90 × 5/18 m/sec

                         = 25m/sec

Therefore, time taken by the train to cross the pole = 150 m/25m/sec = 6 seconds.

2. A train 340 m long is running at a speed of 45 km/hr. what time will it take to cross a 160 m long tunnel?

Solution:            

Length of the train = 340 m

Length of the tunnel = 160m

Therefore, length of the train + length of the tunnel = (340 + 160) m = 500m

Speed of the train = 45 km/hr

Speed of the train = 45 × 5/18 m/sec

                         = 25/2 m/sec

                         = 12.5 m/sec

Therefore, time taken by the train to cross the tunnel = 500 m/12.5 m/sec.

= 40 seconds.

3. A train is running at a speed of 90 km/hr. if it crosses a pole in just 10 second, what is the length of the train?

Solution:            

Speed of the train = 90 km/hr

Speed of the train = 90 × 5/18 m/sec = 25 m/sec

Time taken by the train to cross the pole = 10 seconds

Therefore, length of the train = 25 m/sec × 10 sec = 250 m

4. A train 280 m long crosses the bridge 170 m in 22.5 seconds. Find the speed of the train in km/hr

Solution:            

Length of the train = 280 m

Length of the bridge = 170 m

Therefore, length of the train + length of the bridge = 280 m + 170 m = 450 m

Time taken by the train to cross the bridge = 22.5 sec = 45/2 sec.

Therefore, speed of train = 450 m/22.5 m/sec = 450/45/2 m/sec = 20 m/sec

To convert the speed from m/sec to km/hr, multiply by 18/5

Therefore, speed of the train = 20 × 18/5 km/hr = 72 km/hr

Speed of Train

Relationship between Speed, Distance and Time

Conversion of Units of Speed

Problems on Calculating Speed

Problems on Calculating Distance

Problems on Calculating Time

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Train Passes a Moving Object in the Opposite Direction

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Train Passes through a Bridge

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Two Trains Passes in the Opposite Direction

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get a train crosses an electric pole in 5 seconds and a railway bridge of 600 m long in 35 seconds. find the speed of the train in km/h and length of the train. from screen.

[Solved] A train crosses a pole in 5 seconds and crosses the tunnel i

Given: Time to cross the pole = 5 sec Time to crosses the tunnel = 20 sec Formula used: Speed = Distance/Time Calculation: Let the length of the tunn

A train of length 200 m crosses an electric pole in 10 seconds find the speed of train in km/h

Home Quantitative Aptitude Speed Time and Distance Problem on Trains Train Crossing a Platform

Question

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A train crosses a pole in 5 seconds and crosses the tunnel in 20 seconds. If the speed of the train 90 m/s, then find the length of the tunnel.

1350 m 900 m 1200 m 800 m

Answer (Detailed Solution Below)

Option 1 : 1350 m

Detailed Solution

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Given:

Time to cross the pole = 5 sec

Time to crosses the tunnel = 20 sec

Formula used:

Speed = Distance/Time

Calculation:

Let the length of the tunnel be x m and the length of the train be y m

Time = Distance/Speed

⇒ 5 = (y/90) ⇒ y = 450 m

Time to crosses the tunnel = Distance/Speed

⇒ 20 = (y + x)/90

⇒ 20 × 90 = (450 + x)

⇒ x = 1800 - 450 = 1350

∴ The length of the tunnel is 1350 m.

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A train crosses a pole in 15 seconds while it crosses a 100 m long platform in 25 seconds. The length of the train is

Click here👆to get an answer to your question ✍️ A train crosses a pole in 15 seconds while it crosses a 100 m long platform in 25 seconds. The length of the train is

A train of length 200 m crosses an electric pole in 10 seconds find the speed of train in km/h

Question

A train crosses a pole in 15 seconds while it crosses a 100 m long platform in 25 seconds. The length of the train is

A

125 m

B

135 m

C

150 m

D

175 m

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A train passes over a 600m long bridge. If the speed of a train is 40 metres per second and the train takes 20 seconds to cross the bridge, then what is the length of the train?

Answer (1 of 8):

A train of length 200 m crosses an electric pole in 10 seconds find the speed of train in km/h

A train passes over a 600m long bridge. If the speed of a train is 40 metres per second and the train takes 20 seconds to cross the bridge, then what is the length of the train?

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8 Answers Rajashri Gavali

, Software Developer

Answered 1 year ago · Upvoted by

Rangareddy Yarramreddy

, Ph.D Physics, Kakatiya University (1980) · Author has 935 answers and 324.9K answer views

681 viewsView upvotes

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Srishti Bajaj

, works at Amity International School, Mayur Vihar

Answered 1 year ago

Let us consider the length of the train to be xm

The total distance covered by the train is (600 + x)

speed of the train is 40m/s and it covers the bridge in 20sec.

Speed = Distance/Time

40=x+600/20 800=x+600 x=200m

So the length of the train is 200m.

1.9K viewsView upvotes

Amit Arora

, MCA from Indira Gandhi National Open University (2011)

Answered 1 year ago · Author has 456 answers and 188.2K answer views

Let length of train =x

Total distance to be covered by train= length of the train + length of bridge= x + 600

(x+600)/40=20 x+600=800 x = 200

so length of train is 200 m

184 views

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Saipujitha Sajjavarapu

, lives in Eluru, Andhra Pradesh, India (2020-present)

Answered 1 year ago · Author has 74 answers and 22.1K answer views

Given that a train passes over a 600 m long bridge and train speed is 40 m/s and the train takes 20seconds to cross the bridge

Let x be the length of the train

=>Length of the train=speed of train X time

=>600+x=40×20 =>x=200m

Therefore the length of the train is 200m

140 views Related questions

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A train passes over a bridge with a length of 200 m in 40 seconds. If the speed of the train is 81 km/hr, then what is the length?

Chinnasamy Karunanidhi

, studied at Cost and Management Accountants

Answered 1 year ago · Author has 148 answers and 39.6K answer views

The speed of the train is 40 metres per second

The time taken to cross the bridge is 20 second

The distance travelled =20*40=800 metres

The length of the train=800–600=200 metres

255 views Jayanta Mukherjee

, B Tech IEE Instrumentation Engineering, Jadavpur University (1990)

Answered 1 year ago · Author has 9.8K answers and 4.1M answer views

In 20 seconds, the train travels (40 * 20) metres = 800 metres; which is equal to the sum of lengths of the bridge and the train.

Length of the bridge = 600 metres

Length of the train = (800 - 600) metres = 200 metres.

94 views Rajeev Malhotra , Home Tutor

Answered 1 year ago · Author has 1.8K answers and 285.1K answer views

Speed of train = 40 m/s and time taken = 20 seconds

Distance covered by train = speed x time

D = 40 x 20 = 800 m

D = length of train + length of bridge

800 = length of train +600

length of train = 800–600 = 200 m

1.7K views

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K S Narayanan

, Cost Accountant having 24 years Telecom Experience

Answered 1 year ago · Author has 5.6K answers and 8.4M answer views

Train covers 40 x 20 = 800 metres in 20 seconds.

This distance is equal to length of train + length of bridge.

=> Length of train = 800 - 600 = 200m.

:-) 124 views Related answers Related Answer Rahul Munet

, Watch videos on Nutrition Science

Answered 2 years ago

A train takes 10 seconds to cross a pole and 20 seconds to cross a platform of length 200m. What is the length of the train?

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