Question

if 10 men working 7 hours a day Dig a trench 147 M long how many men working 8 hours a day will be a dig a trench 168 M long

Answer 1

10 men working 7 hours 147 m
1. ". ". 7 ". 14.7m
1. ". ". 1. ". 2.1 m
worker=x
then,
2.1*8*x=168
x=10