Chain Rule
1. Rohit can row 18 kmph in still water. It takes him thrice as long to row up as to row down the river. Find the rate of stream.
A. 27 km/h
B. 18 km/h
C. 9 km/h
D. 36 km/h
C. 9 km/h
2. A boy’s speed with the current is 15 km/h and the speed of the current is 2.5 km/h. The boy’s speed against the current is:
A. 10 km/h
B. 12.5 km/h
C. 2.5 km/h
D. 5 km/h
A. 10 km/h