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?
Answer & explanation
Correct answer: option 3
As we know,
Time is inversely proportional to speed.
Ratio of two racers ,
Speed 100 : 120
5 : 6
6 : 5
According to question ,
6R - 5R = 1R
1R = 10 min
Time taken by first racer to complete race = 6 × 10 = 60 min
Distance = Speed × Time
So , Distance = 60 × 100 = 6000 m = 6 km