Question

a bicycle wheel makes 5000 revolutions in moving 11 km. find the diameter of the wheel

Answer 1

first find the unit rate
then the unit rate (revolution/per km) will be the circumference.
find the radius using the formula
multiply the radius by two to get the diameter, which is 144.62 (unit)

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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