Question

diameter of a wheel is 60 cm, calculate the speed in
km per hour at which the boy is cycling.
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Answer 1

Answer:

Revolution Per Minute = 140

Diameter = 60cm

Speed = ?

Circumference = 2(pi)r

=2*22/7*30

=188.57cm

Distance travelled in an hour = 60*140 per min*Circumference

=8400*188.57cm

=1583988cm

=15.83988km

Therefore, speed = 15.8 km per hour.

Step-by-step explanation:

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Answer 2

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