Question

a bike wheel makes 1500 revolution in moving 30km. find the diameter of wheel

Answer 1

1500= 30/2×22/7×r
r= 30/2×22/7×1500
r= 100×22/7
r= 314.2 cm

Answer 2

The diameter of the wheel is 6.36 m.

Step-by-step explanation:

Given : A bike wheel makes 1500 revolution in moving 30 km.

To find : The diameter of wheel ?

Solution :

Convert km into m,

1 km = 1000 m

30 km = 30000 m

$\text{Circumference of the wheel}= \frac{\text{Distance moved}}{\text{Number of revolution}}$

$\text{Circumference of the wheel}= \frac{30000}{1500}$

$\text{Circumference of the wheel}= 20$

The circumference of wheel is $C=2\pi r$

$2\pi r= 20$

$r=\frac{20}{2\times 3.14}$

$r=3.18$

The diameter of the wheel is $d=2r=2(3.18)=6.36$

#Learn more

A carriage wheel makes 1500 revolutions in going over a distance of 4.5 km. find the radius of the wheel

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