Question

If 10 men working 7 hrs a day dig a trench 147 m long ; how many men working 8 hrs a day will dig a trench 160 m long?

Answer 1

Solution:-

Working 7 hours a day 147 m long trench can be dug by = 10 men.
Working 1 hour a day 147 m long trench can be dug by = 10*7
Working 1 hour a day 1 m long trench can be dug by = (10*7)/147
Working 8 hours a day 1 m long trench can be dug by = (10*7)/(147*8)
Working 8 hours a day 160 m long trench can be dug by = (10*7*160)/(147*8)
= 11200/1176
= 9.523 
As the men cannot be in decimal or fraction, so, the answer is 10 men.

Answer 2

Answer:

hey it's in attachment .. hope it helps u