SSC IB Security Assistant & MTS Mock Test Series 2023 Quantitative Aptitude Time and Work Work Efficiency
A alone can do (1/10) part of a work in 8 hours. B alone can do (1/5) part of same work in 4 hours. If they work together, then how many hours will they take to complete (9/16) part of the same work?
1
9 hours
2
5 hours
3
4 hours
4
8 hours