railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Speed Time and Distance Boat and River
A motorboat, travelling at the same speed, can cover 25 km upstream and 39 km downstream in 8 hrs. At the same speed, it can travel 35 km upstream and 52 km downstream in 11 hrs. The speed of the stream is:
1
9 km/h
2
7 km/h
3
5 km/h
4
4 km/h