Question

2) a) A boy walks from his home to post-office at a distance of
0.5km in 20min. He then returns to his home in 25mins. Find
the average speed of the boy.
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Answer 1

Answer:

1.33 km/hr

Explanation:

Average speed = Total distance/total time

Total time = 20 + 25 = 45min = 3/4 hr

Total distance = 1Km

Average speed = 1/3/4 = 1.33 km/hr

Answer 2

Answer:

4/3 km/hr(see the units)

Explanation:

Average speed=total distance/total time

=0.5+0.5/(1/3+5/12)

(I converted minutes to hours)

So the average speed is

=1/(3/4)

=4/3 km/hr

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Hope it helps