Twenty four men can do a work in 35 days. How many men are required to complete the work in 21 days?  Choose the correct option:	A) 11	B) 40	C) 99	D) 77	E) 21
We have M1 D1 = M2 D2   So, 24 * 35 = M2 * 21 =&gt; M2   = 40.   Answer: 40
<result>B</result>
Twenty four men can do a work in 35 days. How many men are required to complete the work in 21 days?