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A bicycle wheel makes 5000 revolutions i...

A bicycle wheel makes 5000 revolutions in moving 11 km. Find the diameter of the wheel.

A

60 cm

B

80 cm

C

`70 cm`

D

90 cm

Text Solution

Verified by Experts

The correct Answer is:
C
Distance covered by the wheel in 1 revolution
k `=((11xx1000xx100)/500)cm=220cm`
`:.` the circumference of the wheel `=220cm`
Let the diameter of the wheel be `d cm`.
Then, `pid=220implies22/7xxd=220impliesd=220xx7/22=70`
Hence the diameter of the wheel is 70 cm.
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