Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
Sign in
Please select an account to continue using cracku.in
↓ →
Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
A row-boat travels downstream on a river at a speed of 8 m/s with respect to the shore. A motor-boat comes from the opposite direction at a speed of 10 m/s with respect to the water. 10 seconds after meeting each other they are at 160 metres from each other. At what speed (in m/s) does the river flow
Correct Answer: 2
Let the river flow at $$u$$. Relative to the water, the row-boat moves at $$8 - u$$ downstream and the motor-boat at 10 m/s upstream, so they separate at $$18 - u$$. They are 160 m apart after 10 s, so $$18 - u = 16$$ and $$u = 2\text{ m/s}$$.
Was this solution helpful?
Predict your JEE Main percentile, rank & performance in seconds
Educational materials for JEE preparation
Ask our AI anything
AI can make mistakes. Please verify important information.
AI can make mistakes. Please verify important information.