20 workers need 6 hours to build a wall how many hours will 15 workers need to build the same wall

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All questions on Maths

4 men 8hrs to build a wall, how long would it take 7 men to build same wall?

If 4 men take 8 hours then you must first work out how long it takes 1 man. 1 man will take 4 x 8 = 32 hours. Now we work out how many hours it will take for 7 men. The calculation involved here will be 32/7 = 4.57 hours

A fruit conserve contains blackcurrants and redcurrants in the ratio 5to2 There are 300g of redcurrants in the conserve How many grams of blackcurrants are in the conserve? Hom much fruit is in the conserve altogether?

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20 workers need 6 hours to build a wall how many hours will 15 workers need to build the same wall

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