Question

if 10 men working 7hours a day dig a trench 147 m long,how many men working 8 hours a day will dig a trench 168 m long

Answer 1

Answer:

10

Step-by-step explanation:

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.