Question

6. A caterpillar crawls at a speed of 21cm per hour towards a vegetable patch.
After eating its fill it returns, over the same distance, at only 7cm per hour. Not
including the eating time, what is the caterpillar's average speed over the entire
journey?
5.2cm/hour
7.0cm/hour
10.5cm/hour
14cm/hour

Answer 1

Step-by-step explanation:

5.2cm/hour

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Answer 2

Answer:-

average speed = 2*21*7/(21+7) = 2*21*7/28 = 21/2 = 10.5 cm/hour

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