A jogger covered a certain distance at some speed. Had he moved 3 km/hr faster, he would have taken 20 minutes less. If he had moved 1 km/hr slower, he would have taken 10 minutes more. What is the distance (in km) that he jogged?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 12
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Understanding |
Application |
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Had he moved 3 km/hr faster, he would have taken 20 minutes less. If he had moved 1 km/hr slower, he would have taken 10 minutes more. |
Suppose the distance = D km Speed = S km/hr So, D/(S + 3) = D/S – 20/60 And D/(S – 1) = D/S + 10/60 Solving the equation: D = 12 km |