If 60 men can do a piece of work in 25 hours, in how many hours will 15 men
do it ?  Pick.
A) 100 hours	B) 90 hours	C) 80 hours	D) 70 hours	E) 60 hours
Let the required number of hours be x. Then,   Less men, More hours	(Indirect Proportion)   15 : 60 : : 25 : x&lt;=&gt;(15 x x) =(60 x 25)&lt;=&gt;(60 x 25)/15 = 100   Hence, 15 men can do it in 60 hours   100 hoursnswer is 100 hours.
<result>A</result>
If 60 men can do a piece of work in 25 hours, in how many hours will 15 men
do it ?