A and B together can do a piece of work in 3 days. If A alone can do the same work in 20 days, then B alone can do the same work in?  Answers
A) 0.28 days	B) 0.45 days	C) 0.55 days	D) 0.25 days	E) 0.15 days
B = 1/2 – 1/20 =0.28 days   0.28 daysNSWER:0.28 days
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A and B together can do a piece of work in 3 days. If A alone can do the same work in 20 days, then B alone can do the same work in?