engineering recuitment NMDC Maintenance Assistant Fitter 2021 Mock Test Quantitative Aptitude Time and Work Work Efficiency
M is thrice as efficient as N and N is twice as efficient as O. If O alone can complete a piece of work in 25 days, find the time taken by the three of them to complete the piece of work together.
1
20/7 days
2
25/9 days
3
50/6 days
4
20/9 days