In a 400-metre race, A runs at a speed of 16 m/sec. If A gives B a start of 15 metres and still beats him by 10 sec, then what is the speed of B ?

Question :

In a 400-metre race, A runs at a speed of 16 m/sec. If A gives B a start of 15 metres and still beats him by 10 sec, then what is the speed of B ?

Options :

  • 11 m/sec
  • 10 m/sec
  • 13 m/sec
  • 9 m/sec

correct answer : a)

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