Question

A bicycle wheel makes 5000 revolutions in moving 11 km . find the circumference and the diameter of wheel

Answer 1

Solution :


Let the radius of bicycle be 'x' and Distance covered by Bicycle.



Distance covered by Bicycle in 1 Revolution = Distance covered / Total Number of revolution

✒ Distance covered by Bicycle in 1 Revolution = 11/ 5000 km

= 11/5000 × 1000 × 100 cm

= 11/5 × 100 cm

= 11× 20 cm

= 22,0 cm

✍We have Circumference of Circle = 220 cm

✒ Circumference of Circle = πD

✒ Circumference of Circle = 22/7 × D

✒ 22,0 = 22/7 × D

✒ 22,0 × 7 = 22D

✒ 1540 = 22D

✒ Diameter = 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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