If 20 men can build a wall 56 meters long in 6 days , what length of a similar wall can be built by 35 men in 3 days?

Question: If 20 men can build a wall 56 meters long in 6 days , what length of a similar wall can be built by 35 men in 3 days?Solution:Let the required length be x metersMore men, More length built (Direct proportion) Less days, Less length built (Direct Proportion)∴ (20 × 6 × x)=(35 × 3 × 56) ∴ x = 49 Hence, the required length is 49 m.