9. A can do a piece of work in 12 days and B can do it in 15 days. A starts the work and
does it for 3 days, 'Ihe remaining work is done by B alone. In what lime did B finish
the remaining work?
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2
Answer:
Step-by-step explanation:
A = 12 days
A's 1 day work = 1/12
B = 15 days
B's 1 day work = 1/15
Together work = A + B = 1/12 + 1/15
= 5/60 + 4/60
= 9/60
But ,
A starts the work and does it for 3 days = 3 * 9/60
= 9/20
Remaining work = 1 - 9/20
= 11/20
There Fore ,
B will complete the work in 11/20 *20
= 11 Days
Hope this helps you
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