CUET Preparation Today
Shankar can row upstream 5 km/h and downstream 10 km/h, the rate at which he rows in still water is : |
7.5 km/h 2.5 km/h 15 km/h 5 km/h |
7.5 km/h |
The correct answer is Option (1) → 7.5 km/h $x$ → Speed of row $y$ → Speed of current Downstream = $x+y=10\,km/hr$ ...(1) Upstream = $x-y=5\,km/hr$ ...(2) Add (1) and (2) $2x=15$ $x=7.5\,km/hr$ |
