Question

The diameter of a wheel is 1.4 m, find its circumference.​

Answer 1

Given ,

The diameter of wheel = 1.4 m

So , the radius of wheel will be 1.4/2 m i.e 0.7 m

We know that ,

$\sf \large \fbox{ \fbox{Circumference \: of \: circle = 2πr}}$

Substitute the value , we obtain

$\sf \hookrightarrow Circumference = 2 \times \frac{22}{7} \times 0.7 \\ \\\sf \hookrightarrow Circumference =2 \times \frac{22}{ \cancel7} \times \frac{ \cancel7}{10} \\ \\\sf \hookrightarrow Circumference = \frac{44}{10} \\ \\ \sf \hookrightarrow Circumference = 4.4 \: \: cm$

Hence , the circumference of the wheel is 4.4 cm

Answer 2

Given:

• Diameter = 1.4 m

Find:

• Circumference = ?

Solution:

• Diameter = 1.4 m [Given]

So,

• Radius = 0.7 m

Circumference = 2πr

=> 2 × 22/7 × 0.7 m

=> 44 × 0.1

=> 4.4 m

Therefore:

• Circumference of the wheel = 4.4m