if A. B. and C start the work together, but C had to leave after 5 days, find the number of days A and B will then take to complete the work.
A,B and C together can do-1/8
A and b together can do-1/10.
C alone can do -1/40.
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Answer:
Work done by A in 1 day =91
Work done by B in 1 day =181
Work done by B in last 3 days =181×3=61
Remaining work=1−61=65
Work done by A and B in 1 day =91+181=183=61
Hence no. of days in which A and B worked together is =6165=5 days
Then total time to complete the work =3+5=8 days.
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