Question
Download Solution PDFIn 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?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
In a 400-metre race, A runs at a speed of 16 m/sec.
A gives B a start of 15 metres and still beats him by 10 sec.
Concept used:
Distance = Time × Speed
Calculation:
Time taken by A to finish the race = 400/16 = 25 seconds
Since B is given a start of 15 metres, B has to cover = 400 - 15 = 385 metres
Time taken by B to finish the race = 25 + 10 = 35 seconds
Now, speed of B = 385/35 = 11 m/s
∴ The speed of B is 11 m/s.
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