Question

A bicycle wheel makes 5000 revolution in moving 11 km. Then the diameter of the wheel is _______

Answer 1

The circumference of = 5000 / 11 km
the wheel will be = 5000 / 11000 m
= 2.2 m

Then,

$2\pi \: r = 2.2 \\ 2 \times \frac{22}{7} \times r = 2.2 \\ \frac{44}{7} \times r = 2.2 \\ 44r = 2.2 \times 7 \\ 44r = 15.4 \\ r = \frac{15.4}{44} \\ \frac{1}{2} d = \frac{15.4}{44} \\ d = \frac{15.4 \times 2}{44} \\ d = \frac{15.4}{22} \\ d = 0.7$
Therefore diameter will be 0.7m or 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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