Question

the wheel of a car are of diameter 80 cm each . How many complete Revolutions does each wheel make in 10 minutes when the car is travelling at the speed of 66 km per hour?

Answer 1

Speed of the car = 66 KMPH

Distance travelled by the car in 10 min = Speed × time.
= 66 × 10/60 Km.

= 11Km

= 11 × 1000 × 100cm.

= 1100000
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Diameter of the wheel = 80cm.

Radius = d/2 = 80/2 = 40 cm.

We know that circumference of a circle = Distance travelled by one revolution.

Circumference of the circle = 2πr.

= 2× 22/7× 40 cm.

=1760/7cm.

Let the number of revolutions be "n".

Number of revolutions × Circumference of circle = Distance travelled in 10min.

n × 1760/7 = 110000

n = 1100000 × 7/1760

n = 4375.

Therefore number of revolutions in 10min = 4375.

:)

Answer 2

the answer to your question is
4375 times.
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