A, B and C can separately do a work in 12, 15 and 20 days respectivel…

Question

A, B and C can separately do a work in 12, 15 and 20 days respectively. They started to work together but C left after 2 days. The remaining work will be finished in = ?

Accepted Answer

Option A. 4 days. Answer & Solution Answer: Option A Solution: & ( A + B + C ) 's 1 day's work & = ( 112 + 115 + 120 ) & = 1260 & = 1/5 & ( A + B + C ) 's 2 day's work & = ( 1/5 × 2 ) & = 2/5 & Remaining work & = ( 1 - 2/3 ) & = 3/5 & ( A + B ) 's 1 day's work & = ( 112 + 115 ) & = 960 = 320 & No…