If 30 men can build a wall 56 meters long in 5 days, what length of a similar wall can be built by 40 men in 3 days ?




If 30 men can build a wall 56 meters long in 5 days, what length of a similar wall can be built by 40 men in 3 days ?

A. 36.5 m

B. 44.8 m

C. 62.3 m

D. 92 m

Answer : B. 44.8 m


Explanation:


    Let the required length be x meters
    More men, More length built (Direct proportion)
    Less days, Less length built (Direct Proportion)
    (30 x 5 x X) = (40 x 3 x 56)
    => x = 44.8
    Hence, the required length is 44.8 m.



If 30 men can build a wall 56 meters long in 5 days, what length of a similar wall can be built by 40 men in 3 days ?