Multiple Choice Questions

in a 100 m race A runs at 8 kmph If A gives B a start of 4 m and still beats him by 15 seconds what ...........

Quantitative Aptitude (CSC) Time & distance

in a 100 m race, A runs at 8 kmph. If A gives B a start of 4 m and still beats him by 15 seconds, what is the speed of B?

5 kmph

5.76 kmph

6 kmph

6.34 kmph

None of the above/More than one of the above

5.76 kmph

Time taken by A to cover 100 m = (60 x 60 / 8000) x 100 sec = 45 sec.

B covers (100 - 4) m = 96 m in (45 + 15) sec = 60 sec.

B's speed = (96 x 60 x 60)/ (60 x 1000) km/hr = 5.76 km/hr.

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