Question

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

wheel.​

Answer 1

GIVEN:

• total number of revolution made by a bicycle = 5000
• Distance covered = 11km

TO FIND:

• the diameter of the wheel = ?

EXPLANATIONS:

Let the radius of the wheel be r cm.

Now , distance covered by wheel in one revolution

$\sf \: \frac{distance \: moved}{no. \: of \: revolutions}$

= 11/ 5000km

$( \frac{11}{5000} \times 1000 \times 100) \: cm \\ \\ = 220 cm$

Now , the circumference of the wheel = 220cm.

We know that ,

2πr = 220 cm

πd = 220 cm

$\sf \: diameter \: = \frac{220 \times 7}{22} \\ \\ \sf \: diameter \: = 70cm$

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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