Father is 5 times faster than son. Father completes work in 40days before son. If both of them work together when will work get complete?
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Suppose time taken by father to complete the work = x days
Because father is 5 times faster than son then son will be taking 5 times of the time than his father = 5x days
5x = x+40
5x-x =40
4x = 40
x =10
So time taken by father is 10 days
time taken by son is 50 days
per day
father 1/10 days
son 1/50 days
father and son when both work together
1/10 + 1/50 = 6/50
So time taken by both father and son = 50/6
Hope it helps you.
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