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A and run a kilometre and wins by 25 seconds. and run a kilometre and wins by and run the same distance and wins by . What is the time taken by A to run a kilometre?

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answer is A.

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Detailed Solution

Concept- The speed of a moving body in relation to another is defined as relative speed. When two bodies move in the same direction, their relative speed is calculated by subtracting their speeds.
When

covers a distance of

seconds, then

covers the distance of

seconds.
Similarly, when

covers a distance of

then in the same time

covers only 725 metres If

covers the distance of

seconds, then

covers the distance of

seconds.
Also,

covers a distance of 725 metres in

seconds.
Now,

Therefore,

covers a distance of

.
Hence, the correct answer is 1)

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A and run a kilometre and wins by 25 seconds. and run a kilometre and wins by and run the same distance and wins by . What is the time taken by A to run a kilometre?

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