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A boy walks 800m in 20 minutes. Calculate his average spe...

A boy walks 800m in 20 minutes. Calculate his average speed in km per hour

A.

2.4

B.

4

C.

16

D.

24

Correct answer is A

Averagespeed=DistanceTimetakenDistance=800m=8001000km=0.8kmTimetaken=20minutes=2060hr=13hrAveragespeed=(0.8÷13)km/hr=(0.8×3)km/hr=2.4km/hr