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In a 200 m race, Arjun runs at 15kmph. If Arjun gives Karna a start of 5 m and still beats him by 6 seconds, what is the speed of Karna in kmph?

A.	11 kmph	B.	15 kmph
C.	13 kmph	D.	23 kmph

Answer and Explanation

Answer:13 kmph

Explanation:
to win the race Arjun will have to cover the distance of 200m
=> While Karna will have to cover the distance of only 195m as Arjun gives Karna 5m.
=> Speed of Arjun is 15kmph so time taken by arjun will be (200 x 18)/(15 x 5) i.e. 48 sec. arjun beats Karna by 6 sec. so time taken by karna to cover the distance of 195m will be (48 + 6) i.e. 54 sec
Hence the speed of Karna = (195/54)(18/5) = 13kmph

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