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The sum of the ages of A and B is 85 yea...

The sum of the ages of A and B is 85 years. 5 years ago, the age of A was twice that of B. Find the present ages.
OR
A piece of work can be done by 2 men and 7 boys in 4 days. The same piece of work can be done by 4 men and 4 boys in 3 days. How long it would take to do the same work by one man of one boy?

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The correct Answer is:
`:.` Present age of A is 55 years and `B=30` years.
OR
Thus, one man can complete the work in 15 days and one boy can do the work in 60 days.
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