60. If 20 men can build a wall 66 metres long in 6 days, what length of a similar can be built by 86 men in 8 days?
Answer:
Let the required length be x metres
More men, More length built (Direct Proportion)
Less days, Less length built (Direct Proportion)
Men 20: 35
Days 6: 3 : : 56 : x
Therefore (20 x 6 x x)=(35 x 3 x 56)x=(35 x 3 x 56)/120=49
Hence, the required length is 49 m.
Title : Chain Rule Q60
Description : 60. If 20 men can build a wall 66 metres long in 6 days, what length of a similar can be built by 86 men in 8 days? Answer: Let the require...
Rating : 5
