Question

the diameter if the wheel of car is 70 cm sq. how many revolution will it take to travel to 66 km​

Answer 1

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Diameter of the Wheel=70 cm

$\therefore$radius=(70/2)cm=35 cm

Now the wheel will cover a distance of it's perimeter by revolving once and it is 2πr

where, r=radius of that wheel

here r=35 cm

$\therefore$ distance covered by the wheel in 1 revolution is=2(22/7)(35)cm=220 cm

therefore Number of Revolutions that it will take to cover a distance of 66 km =66,00,000 cm is

$\rightarrow \frac{6600000}{220} \\ \rightarrow 30000$

$\therefore$the wheel will take 30,000 revolutions to cover the distance of 66km

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Answer 2

Step-by-step explanation:

Diameter of circle=70cm

Radius of circle=35cm

circumference of circle=1 revolution of wheel=2πr

=2×π×35

= 70π

= 70×22/7

= 220cm

220cm = 1 Revolution

66km = 6600000cm

Total number of revolution= Total Distance/Total distance in 1 revolution

=6600000cm/220cm

=30000 Revolution