Question

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

Answer 1

In 5000 revolutions, bicycle covers 11 km (11000 m)
==============================

In 1 revolution, bicycle covers $\frac{11000}{5000}$ = 11/5 m 

It means that the circumference of the wheel is 11/5 = 2.2 m 

2πr = 2.2 m = (2.2 × 100)cm

diameter × π = 220 cm 

diameter × 22/7 = 220 cm

diameter × 1/7 = 10 

diameter = $\frac{10}{ \frac{1}{7} }$

diameter = 70 cm




i hope this will help you


-by ABHAY

Answer 2

Diameter is 3.5m as:
5000*2*22/7*radius= 11000m
r=11000*7/5000*2*22