Sam Walks to his school which is 3km away from his home in 30 minutes,On reaching ,he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes.what is his average speed in km/h for the whole journey?

8.3

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7.2

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Solution

The correct option is B 7.2
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Sam Walks to his school which is 3km away from his home in 30 minutes,On reaching ,he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes.what is his average speed in km/h for the whole journey?

The correct option is B 7.2---

The correct option is B 7.2
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