A can do a piece of work in 20 days. He worked for 5days and B finished the remaining work in 42days. B alone can do the whole work in how many days?
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A does the whole work in 20 days.and he worked for 5 days.
B worked for 42 days to complete the remaining work i.e. 15 days work.
3/4 of the work completed in 42 days.
Remaining 1/4 work will be completed in 14 days.
Therefore 42 + 14 = 56 days required to complete the whole work by B
B worked for 42 days to complete the remaining work i.e. 15 days work.
3/4 of the work completed in 42 days.
Remaining 1/4 work will be completed in 14 days.
Therefore 42 + 14 = 56 days required to complete the whole work by B
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