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:

1.

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].	5.15 kmph
[B].	4.14 kmph
[C].	4.25 kmph
[D].	4.4 kmph

Answer: Option B

Explanation:

A's speed =		5 x	5	m/sec	=	25	m/sec.
			18			18

Time taken by A to cover 100 m =		100 x	18	sec	= 72 sec.
			25

Time taken by B to cover 92 m = (72 + 8) = 80 sec.

B's speed =		92	x	18	kmph	= 4.14 kmph.
		80		5

Leave a Comment

Aptitude :: Races and Games : More Exercises

Races and Games - General Questions