Question

2. The diameter of a wheel of a car is 48 cm. If the car travels at an average speed of
3.5 km/h, find the number of revolutions made by the wheel per minute, giving
your answer correct to the nearest whole number (Take to be 3.142.)

Answer 1

Answer:1980 m

Step-by-step explanation:

Answer 2

The car made 25207 revolutions per hour.

Step-by-step explanation:

Given Diameter of car wheel = 60 cm

Radius 30 cm (radius is half of diameter)

-0.3 m (1 cm = 0.01 m)

Circumference of the wheel = 2\pi r

= 2(3.142)(0.3)=1.8852 meters

Average Speed of the car is 13.2m/s.

One hour 3600 seconds

Distance covered in one hour = 3600x 13.2 =47520 meters

Number of revolutions in one hour = (Distance covered in an hour) + (Circumference of the wheel)

=47520 ÷ 1.8852 =25206.8746022 =25207 [Rounded to the nearest

whole number.]

.. The car made 25207 revolutions per hour.

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