A and B take part in a 200 meters race. A runs at 5 km. per hour, A gives B a start of 16 meters and still beats him by 16 seconds. Speed of B is?
Explanation:
A’s speed = (5 × 5/18) meters/second = 25/18 meters/second.
Time taken by A to cover 200 meters = 200 × 18/25 = 144 seconds.
∴ B covers 184 meters in (144 + 16) = 160 seconds.
B’s speed = 184/160 × 18/5 = 4.14 km/h.
Hence, option (b).
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