Question

Radius of a cycle wheel is 28cm, how much distance will it cover in 10 revolutions ?​

Answer 1

Answer:

Diameter =28 cm.

radius =

2

d

=

2

28

=14 cm

circumference = 1 revolution

∴ circumference = 2πr

=2.

7

22

.14

=88 cm

The distance will cover in 100 revolutions = 100×88

=8800 cm =88 m.

Answer 2

Answer:

1760$cm^{2}$

Step-by-step explanation:

According to the information provided in the question it is given as

Radius of a cycle wheel = 28 cm,

We need to find how much distance will it cover in 10 revolutions

Here it is necessary to understand the question  in this it is given as Radius of cycle wheel means radius of a circle as wheel is in the shape of circle .

With the help of formula first we find the diameter of circle

Diameter =d = 2 x r

Substituting the values  we get diameter.

D = 2 x 28

D = 2 x 28

D = 56 cm

Now this is the diameter of cycle wheel

The circumference of a circle is defined as the linear distance around it. In other words, if a circle is opened to form a straight line,

By this definition it is clear that circumference is equal to one complete revolution

Hence we find the circumference of circle

$C = 2\pi r\\C =2\times \frac{22}{7} \times 28\\C =2\times 22\times 4\\C = 176 cm^{2}$

Hence for one revolution = 176

Distance for 10 revolution  = 10 x 176

                                          = 1760$cm^{2}$

Hence wheel cover a distance of 1760$cm^{2}$ in 10 revolution