If Neha is 10
Both Sonali and Priyanka is 15
Both Sadaf and Tanu is 10.
How much is Prinka by the same system ?
A tank can be filled by one tap 20 minute and by another 25 minute. Both the taps are kept open for 5 minute and then second is turned off. In how many minute more is the tank completely filled.
P is able to do a piece of work in 15 days and Q can do the same work in 10 days. If they can work together for 2 days, what is the fraction of work left?