other govt exam India Post Postman & Mail Guard Mock Test 2020 Quantitative Aptitude Time and Work Work Efficiency
Ganga and Saraswati, working separately can mow a field in 8 and 12 hours respectively. If they work in stretches of an hour alternately, Ganga beginning at 9 am., when will the mowing be finished?
1
6 pm
2
6.30 pm
3
5 pm
4
5.30 pm