Question

The circumference of a circle is 9.05cm.
Find the length of the diameter.
Give your answer rounded to 2 DP.

Answer 1

Answer:

2.88cm

Step-by-step explanation:

2πr=9.05

2r=9.05×7/22

d=63.35/22

f=2.88cm

Answer 2

Given:-

• The volume and total surface area are numerically equal.⠀

⠀

To find:-

• Diameter of the sphere.⠀

⠀

Solution:-

Let,

• the radius of the sphere be r.⠀

⠀

We know that,

→ Volume of sphere = 4/3πr³

→ Surface area of sphere = 4πr²⠀

⠀

☆Volume of a sphere = surface area of a sphere

⇛ 4/3πr³ = 4πr²

⇛ r = 3 cm⠀

⠀

Therefore,

• Diameter = 2r = 2 × 3 = 6 cm

⠀⠀

Hence,

• the diameter of the sphere is 6 cm.