Question

the diameter of a cycle wheel is 42 cms . how many rotations will it make to travel 1.98km​

Answer 1

Answer:

1500

Step-by-step explanation:

2x22/7x21 (circumference)

132cms

1.98km=198000cms

198000/132=1500

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Answer 2

Answer:

If the diameter of the cycle wheel is 42 cms , then it takes about 1500 rotations to travel 1.98 kms.

Step-by-step explanation:

Given diameter of the cycle wheel is 42 cms

Distance that can travel in one rotation = circumference of the wheel

= $2\pi r$

Where r is radius of wheel.

Given 2r = 42 cms

$\pi = 3.14$

Therefore, 2$\pi r$ = 42× 22/7

=132cms

Hence the wheel travels 132 cms in one rotation

Rotations the wheel will make to travel 1.98 kms :

Let's convert 1.98 km into cms :

1.98 km =198000 cms

No of rotations required to travel 198000 cms = $\frac{198000}{132}$

= 1500 rotations