Question

A circular wheel has a radius of 7cm. How far will it roll in 10 revolution?

Answer 1

Answer:

4m 40cm or 440 cm

Step-by-step explanation:

As per the provided information in the given question, we have :

• Radius of the wheel = 7 cm

We are asked to calculate how far will it roll in 10 revolution.

Basically, circumference of the wheel will be the distance covered in 1 round. So, we need to calculate the circumference of the wheel first.

We know that,

$\underline{\boxed{\sf { Circumference_{(Circle)} = 2\pi r}} }$

Substituting values,

➝ Circumference = 2 × $\sf \dfrac{22}{7}$ × 7 cm

Cancel 7 into the numerator and the denominator.

➝ Circumference = ( 2 × 22 ) cm

Multiplying 22 with 2.

➝ Circumference = 44 cm

➝ Distance covered in 1 round = 44 cm

$\therefore$ It'll roll 44 cm in 1 round.

Now, we got that it'll roll 44 cm in one round. Since we are asked to find how far will it roll in 10 revolution. So,

➝ Distance covered in 10 rounds = Distance covered in one round × 10

Substituting values.

➝ Distance covered in 10 rounds = ( 44 × 10 ) cm

➝ Distance covered in 10 rounds = 440 cm

$\therefore$ It'll roll 440 cm or 4 m 40 cm in 10 rounds.