Question

if 20 men can build a wall 56 metres long in 6 days.what length of a similar wall can be built by 35 men in 3 days​

Answer 1

Answer:

49

Let the required length be x meters

More men, More length built     (Direct proportion)  

Less days, Less length built      (Direct Proportion)

Men20:35Days6 : 3}⋮⋮ 56 :x  

=> (20 x 6 x X)=(35 x 3 x 56)  

=> x = 49  

Hence, the required length is 49 m.