Man, woman and a boy finish work together in 6 days. Man alone takes 10 days; woman alone takes 24 days then how many days boy alone will take to do that work?
Choices.
A) 20 days	B) 30 days	C) 40 days	D) 50 days	E) 60 days
Let M, W , B be man, women, nd boy   M + W + B 's 1 day work = 1/6   M's 1 day work = 1/10   W's 1 day work = 1/24   M + W's 1 day work = 1/10 + 1/24 ==&gt; 34/240 = 17/120   B's 1 day work = (M + W + B) - (M + W)   ==========&gt; 1/6 - 17/120 ==&gt; 120 - 102/720   ==========&gt;18/720 = 1/40   So boy alone ll finish d work in 40 days   ANSWER:40 days
<result>C</result>
Man, woman and a boy finish work together in 6 days. Man alone takes 10 days; woman alone takes 24 days then how many days boy alone will take to do that work?