Question

A cycle wheel makes 5000 revolutions to cover 11 km.Find it's circumference​

Answer 1

Answer:

0.70 m

Step-by-step explanation:

Distance the wheel travels= 11,000 m.

Number of revolutions it makes= 5,000

To find how much the wheel travels in one rotation, divide distance by number of revolutions

11,000 / 5,000 = 11 / 5 m

Now, one revolution means the coming back of a point at the same place it started with. So number of revolutions is going to be equal to the circumference of the wheel.

Hence circumference of the wheel = 11 / 5

We know that the formula for circumference of a circle is 2 (pi) r

So 2 (pi) r = 11 / 5

We get “r” as 0.35 m

Because diameter is twice the radius the diameter would be 0.70 m

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Answer 2

Answer:

70 cm

Step-by-step explanation:

Let the radius of the wheel be r cm.

Distance covered by the wheel in one revolution = 500011 km = 220 cm

2πr=220

2×722×r=220

r=35 cm

Diameter = 2r=70 cm

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