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Saturday, December 22, 2018

A can do a piece of work in 18 days, B in 27 days, C in 36

A can do a piece of work in 18 days. B in 27 days and C in 36 days. They start working together but only C work till the completion. A leaves 7 days and B leaves 8 days before the completion of work. The whole work was completed in.
A12 days
B16 days
C14 days
D11 days

Answer is : 12 days

Let the work be completed in x days

(x-4) days of A + (x-6) days of B + x days of C = 1 

x418+x627+x36=1

13x48108=1

so, x=12

 

Akilesh Kharvi
answered Nov 5 '2016 at 0:36

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