The diameter of the wheel of a car is 56 cm. Calculate : The speed of the car, in km per hour, if its wheel makes 75 revolutions in 1 minute
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Answer:
835.2 km/h
Step-by-step explanation:
We have
Diameter of the wheel = 56 cm.
Radius of the wheel.
2
Diameter
=
2
56
=28 cm.
Circumfrence of the wheel = 2πr
2×
7
22
×28
= 2×22×4
= 8×22
= 1.76 cm.
Given that, = 1.76 mtr.
Number of revolutions in 1 minute = 750
Distance covered = 750×1.76
= 13.92 km.
Distance covered in 60 minute = 13.92×60
= 835.2 km/h
Hence, this is the answer.
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