engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Speed Time and Distance Boat and River
The ratio of speed of boat in still water and speed of current is 5 : 2. If total time taken by a boat to go 84 km upstream and come back to the same point is 20 hours, then what is the average of the speed of boat in still water and speed of current?
1
6 km/h
2
5 km/h
3
8 km/h
4
7 km/h