Question

The diameter of the wheel of a car is 70cm. How many revolution will it make to travel 99 km.​

Answer 1

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Answer:

Given Data of Wheel -

Diameter = 70 cm

Radius = Diameter / 2 = (70 / 2) cm

= 35 cm

∴ Circumference of wheel

= 2Πr

= [ 2 × 22 / 7 × 35 ] cm

= [ 2 × 22 × 5 ] cm

= 220 cm

Distance travelled by the wheel

= 99 km

= (99 × 100,000) cm

= 9,900,000 cm

∴ Number of Revolutions

=Distance Travelled/Circumference of Circle

= 9,900,000 cm / 220 cm

= 9,900,000 / 220

= 45,000

Hence, the wheel will take 45,000 complete revolutions to travel 99km.

Step-by-step explanation:

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Answer 2

Answer:

1414 revolutions

Step-by-step explanation:

as the diameter of wheel is 70 cm

the car will travel 70cm for 1 revolution

total distance travelled is 99 kilometers

we need to convert it to centimeters

99km=99000cm

by dividing 99000 by 70 we get 1414