Two racers run at a speed of 100 m/min and 120 m/min, respectively. If the second racer takes 10 minutes less than the first to complete the run, then how long is the race?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e 6 km.
| Understanding/Application |
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The ratio of speeds of the racer = 100: 120 = 5: 6 The ratio of the time of the racers = 6: 5 Let the time be 6x and 5x. |
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Difference in time = 6x - 5x = x x = 10 min 6x = 6(10) = 60 min Speed of the racer = 100 m/min Distance = speed × time = 100 × 60 = 6000 m = 6km |