Question

The diameter of the wheel of a car is 70cm .how many revolutions will it make to travel 1.65 km?​

Answer 1

Given it should travel 1.65 km = 1.65 ×1000×100 cm

= 165000 cm

now,radius = diameter/2

= 70/2

=35 cm

now, circumference = 2π r

= 2×(22/7)×35

= 220 cm

it means, 220 cm = 1 revolution

then, 165000 cm = 165000/220

= 750 revolution

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Answer 2

Step-by-step explanation:

REMEMBER

100000 CM = 1KM

circumference of the wheel of the car

= πd

= 22/7×70

= 220 cm

Now, revolutiontaken by the car to cover the distance = 165× 100000/ 100 × 220

= 750 revolution s

r evolution taken by the car to cover the distance = 750 revolution

see the attachment

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