engineering recuitment NFC Chemical Plant Operator Mock Test Quantitative Aptitude Speed Time and Distance Boat and River
A motorboat, whose speed in still water is 7 km/h goes 20 km upstream and come back in a total time of 7 hours. Calculate the speed of stream.
1
5 km/h
2
3 km/h
3
10 km/h
4
9 km/h