Question 145
In a 5000-meter race, if runner A runs at a speed of 12 meters per second and runner B runs at a speed of 15 meters per second, how many seconds will it take for runner B to finish the race if runner A finishes the race in 20 minutes?
Solution
If A is running for 20 minutes, then the total length of the race is 20*60 * 12 = 14400 metres.
For this distance, B will take 14400/15 = 960 seconds i.e. 16 mins.
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