Question

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

Answer 1

Circumference of the wheel = 'pi' d

= 3.14 × 70

= 219.8 cm

1 km = 1000 × 100 = 100000 cm

Number of revolutions = 100000/219.8 = 454.94 =~ 454 revolutions.

-WonderGirl

Answer 2

Answer:

⛤HERE IS YOUR ANSWER⛤

Diameter of the wheel (d) = 70 cm

Radius of the wheel (r) = d/2 cm = 35 cm

The wheel is a circle, so perimeter (p) of the wheel is 2πr cm.

So, p = 2 × π × 35 cm

= 70 π cm

Total distance (d') = 1.65 km

= 1650 m = 165000 cm.

Therefore, total revolutions to be made by the wheel is

= d'/p

= 165000/70π

= 750 (approximately).

⛤HOPE THIS IS HELPFUL⛤