A can do a piece of work in 80 days. He works at it for 10 days and then B alone finishes the remaining work in 42 days. The two together could complete the work in.
Meh iz good
(~‾▿‾)~
But poor again
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10 × 1/80= 1/8
Remaining work=1-1/8
8-1/8
7/8
42×8/7
6× 8
48
1/80 + 1/48
3+5/240
8/240
1/30
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