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Myra cycles to a friend's house 5 km awa...

Myra cycles to a friend's house 5 km away to deliver a packet. She goes at a speed of 12 km/ hour and returns at a speed of 8 km/h. Her average speed during the whole trip is -

A

5 m/s

B

20 km/h

C

9.6 km/h

D

10 km/h

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The correct Answer is:
C
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