Question

Find the circumference of a well, if its diameter is 1.5 metre.

Answer 1

Step-by-step explanation:

Diameter = 1.5 m

Circumference = Pi×D = 3.14×1.5 m = 4.71 m

Answer 2

Given:

✰ Diameter of a well = 1.5 m

To find:

✠ The circumference of a well.

Solution:

We will calculate circumference by using formula and doing required calculations.

Diameter:

• A chord of a circle passing through its centre is called diameter of a circle.
• D = 2r
• ∴ R = D/2

Circumference:

• Circumference of a circle refers to whole arc of a circle, that is the perimeter of the length of the total boundary of the circle.
• C = π × Diameter, or
• C = π × ( 2r ) = 2πr

Let's find out...♪

✭ Circumference = π × Diameter ✭

➤ Circumference = π × 1.5

➤ Circumference = 22/7 × 1.5

➤ Circumference = 22/7 × 1.5

➤ Circumference = 33/7

➤ Circumference = 4.714 m

∴ The circumference of a well ≈ 4.71 m

What if we need to find radius of well also?

✭ Radius = Diameter/2 ✭

➛ Radius = 1.5/2

➛ Radius = 15/(2 × 10)

➛ Radius = 15/20

➛ Radius = 0.75 m

∴ The radius of a well = 0.75 m

_______________________________