10. Raman can finish a work in 10 days. Amar can do it in 15 days. They work together for 4 days and then Raman leaves the work. In how many days will Amar complete the remaining work?
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1 day work of Raman will be 1/10
1 day work of Amar will be 1/15
They together work for 4 day ->. 4 X 1/15 X 1/10 =4/150
if ramen leave the work then total work left will be 4/150 - 1/150 = 3/150 work if left as we subtracted the work done with total work (1/150) and hence 3 /150
That means 3 days will be needed by Amar
1 day work of Amar will be 1/15
They together work for 4 day ->. 4 X 1/15 X 1/10 =4/150
if ramen leave the work then total work left will be 4/150 - 1/150 = 3/150 work if left as we subtracted the work done with total work (1/150) and hence 3 /150
That means 3 days will be needed by Amar
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