Ritu can row downstream 20 km in 2 hours, and upstream 4 km in 2 hours. Her speed of rowing in still water and the speed of the current is:
A. 6km/hr and 3km/hr
B. 7km/hr and 4km/hr
C. 6km/hr and 4km/hr
D. 10km/hr and 6km/hr
Answer:C
Ritu can row downstream 20 km in 2 hours, and upstream 4 km in 2 hours. Her speed of rowing in still water and the speed of the current is:
A. 6km/hr and 3km/hr B. 7km/hr and 4km/hr C. 6km/hr and 4km/hr D. 10km/hr and 6km/hr
Explanation: Let, Speed of Ritu in still water = x km/hr