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Question

The following table shows the distance covered by a motor bike in different time intervals.


Calculate the average speed (P) of the body and the speed of the body (Q) in the interval 12:00−12:30 h.

A
P=1009 m s1; Q=503 m s1
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B
P=1756 m s1; Q=503 m s1
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C
P=503 m s1; Q=1009 m s1
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D
P=1756 m s1; Q=1756 m s1
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Solution

The correct option is A P=1009 m s1; Q=503 m s1
From the given table, we can calculate the total time and total distance, as follows:

The average speed of the body =Total distanceTotal time

P=80 km2 h=40 kmph

=40×518 m s1

=20018 m s1=1009 m s1

The speed of the body in the time interval 12:0012:30 h is:
Q=30 km30 min=1 km1 min=1000 m60 s

Q=100 m6 s=50 m3 s=503 m s1

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