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The position versus time graph of a moving particle is shown.
What is the total distance covered by the particle?

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15 km

20 km

30 km

40 km

answer is D.

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Detailed Solution

The total distance travelled by the particle can be obtained from the given position versus time graph.

In the first 15 hours, the given particle covers 20 km.

Between the 15^th hour and the 20^th hour, it covers 15 km.

Between the 20^th hour and the 25^th hour, it covers 5 km.

∴Total distance covered by the particle = 20 + 15 + 5 = 40 km

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