Subject
Quantitative Aptitude
Topic
Speed & Distance
A and B take part in 100 m race. A runs at 5 kmph. A gives B a start of 8 m and still beats him by 8 seconds. The speed of B is:
A and B take part in 100 m race. A runs at 5 kmph. A gives B a start of 8 m and still beats him by 8 seconds. The speed of B is:
ক)
5.15 kmphখ)
4.14 kmphগ)
4.25 kmphঘ)
4.4 kmphExplanation
A’s speed = (5×5/18) m/sec = 25/18 m/sec Time taken by A to cover 100 m = (100×18/25) sec = 72 sec So, Time taken by B to cover 92 m = (72+8) = 80 sec So, B’s speed = (92/80)×(18/5) kmph = 4.14 kmphRelated questions
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