22 Men Can Dig 27 M Long Trench In One Day

22 men can dig a 27 m long trench in one day. How many men should be employed for digging 135 m long trench of the same type in one day?

Answers:

Men : Length trench :: Men : Length of trench

22    :   27 m              ::    x    :   135 m

X = (22 135)/27 = 110 men