engineering recuitment NPCIL Plant Operator Mock Test Quantitative Aptitude Speed Time and Distance Boat and River
A ship whose speed is 85 km/hr in still water goes 720 km downstream and come back in a total time of 17 hrs. What is the speed of the stream (in km/hr) ?
1
4 km/hr
2
10 km/hr
3
6 km/hr
4
5 km/hr