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  1. In a 400 m race, A runs at a speed of 16 m/s. If A gives B a start of 16 m and still beats him by 40 s, What will be the speed of B?
    1. 6 m/s
    2. 8 m/s
    3. 15 m/s
    4. 5.9 m/s
Correct Option: D

Time taken by A to cover 400 m = Distance/ Speed
= 400/16 s = 25 s
∴ B covers (400 -16) = 384 m in(25 + 40) = 65 s
∴ B's speed = 384/65 =5.9 m/s


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