Question

A boy covers 50 m in 10 second 40 m in next 10 seconds and 30 m in last 10 seconds calculate the average speed of the boy .

Answer for class 7 chapter:13 motion and Time sub: science

Answer 1

Answer:

average speed= total distance travelled÷ total time taken

total distance= 50+40+30= 120

total time taken= 10+10+10= 30 seconds

average speed= 120÷30=4m/s

Answer 2

Explanation:

The formula of speed:

Speed=Distance/Time

Given distance=10m

Time=40s

Speed=10/40

=1/4

=0.25m/s

Hence,

0.25m/s is the speed of the boy.

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