Question

A bicycle wheel makes 5000 revolution in moving 11 km .find the diameter of the wheel

Answer 1

Answer:

70cm

Step-by-step explanation:

11 km = 11000 m

In 5000 revolutions it goes 11000 m

So in 1 revolution it goes = 11000/5000 = 11/5 m

1 revolution means circumference of the wheel*

Hence 2πr = 11/5 m where r is the radius of the wheel.

So, 2r = 11/5π = 11*7/5*22 = 0.7 m = 70 cm

Answer 2

Answer:

The diameter is 70 cm

Step-by-step explanation:

Let the radius of the wheel be r cm.

Distance covered by the wheel in one revolution =  

5000

11

​  

 km = 220 cm

2πr=220

2×  

7

22

​  

×r=220

r=35 cm

Diameter = 2r=70 cm

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