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Alex went to ...

Question

Alex went to school, riding his bicycle at 8 km/hr and came back at a speed of 12 km/hr. What is the average of his speeds?

A

20 km/hr

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B

6 km/hr

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C

8 km/hr

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D

10 km/hr

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Solution

The correct option is D 10 km/hr
Average of Speeds = $\frac{S p e e d 1 + S p e e d 2}{2}$

= $\frac{8 + 12}{2}$
= $\frac{20}{2}$ = 10 km/hr

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