A and B together can do a piece of work in 12 days, B and C
together in 15 days and C and A together in 20 days. In how
many days, can A, B and C together do it ?

(a) 5 days

(b) 10 days

(c) 24 days

(d) 30 days

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A and B together can do a piece of work in 12 days, B and C together in 15 days and C and A togethe..

Answer / mukherzee

( b ) 10 days

Is This Answer Correct ?    13 Yes 2 No

A and B together can do a piece of work in 12 days, B and C together in 15 days and C and A togethe..

Answer / beda

2(A+B+C)=1/12 + 1/15 +1/20=1/5 ( in one day)
(A +B +C) = 1/10 in one day

Therefore A +B +C can complete in 10 days

Is This Answer Correct ?    6 Yes 2 No

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