If 72 men can do a piece of work in 25 hours, in how many hours will 15 men
do it ?  Choose the correct answer: A) 120 hours B) 110 hours C) 100 hours D) 90 hours E) 80 hours
Let the required number of hours be x. Then,   Less men, More hours	(Indirect Proportion)   15 : 72 : : 25 : x&lt;=&gt;(15 x x) =(72 x 25)&lt;=&gt;(72 x 25)/15 = 120   Hence, 15 men can do it in 60 hours   120 hoursnswer is 120 hours.
<result>A</result>
If 72 men can do a piece of work in 25 hours, in how many hours will 15 men
do it ?