Question

A car wheel makes 2500 revolution in moving 5.5km. Find
the diameter and circumference of the car wheel.​

Answer 1

Answer:

In one revolution distance =

5.5km / 2500 = 5.5*1000 m /2500 = 5500/2500 = 55/25 m

2πr = 55/25 = 2.2m

2r = (2.2)/(22/7) = 15.4/22 = .7 m

= 70 cm

Circumference = 2.2 m = 220 cm

Diameter = 70 cm

Step-by-step explanation:

Answer 2

The diameter of circle is 0.7 m and circumference of car wheel is 2.2 m

Step-by-step explanation:

Distance traveled in 2500 revolutions= 5.5 km

Distance traveled in 1 revolution = $\frac{5.5}{2500}=0.0022 km$

1 km = 1000 m

0.0022 km = 2.2 m

So, Circumference of wheel = 2.2 m

Formula of circumference of wheel = $2 \pi r$

So, $2 \pi r = 2.2$

$2 \times \frac{22}{7} \times r = 2.2$

$r = \frac{2.2 \times 7}{2 \times 22}$

r=0.35 m

So, Diameter of wheel = 2r = 2(0.35)= 0.7 m

Hence The diameter of circle is 0.7 m and circumference of car wheel is 2.2 m

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