A walking speed of 5 km/h causes a student to miss the bus by 10 minutes. At 6 km/h, he arrives 5 minutes early. What is the distance?
A6 km
B7.5 km
C9 km
D12 km
Explanation
Time diff = 15 mins = 1/4 hr. Equation: d/5 – d/6 = 1/4 => d/30 = 1/4 => d = 30/4 = 7.5 km.
Exam Relevance
- Topic: Age Problems, Time & Distance, Work
- Subtopic: Distance & Speed Difference
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