In a 100 meter race, A runs at 5Km/h. A gives B a start

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In a 100 meter race, A runs at 5Km/h. A gives B a start of 8 meter and still beats him by 8 sec. Find out the speed of B.

1. 6.14 Km/h
2. 4.14 Km/h
3. 3.14 Km/h
4. 2.14 Km/h

Correct Option: B

Time taken by A to cover 100 meters
= 100 ÷ (5 * 5 / 18) = 72 seconds.
∴ B covers (100 - 8) or, 92 meters in (72 + 8) or, 80 seconds.
∴ Speed of B = ( 92 / 80 ) * ( 16 / 5 ) = 4.14 Km/h.