Question

find the volume and surface area of a sphere of radius 2.1 cm is equal to 22/7​

Answer 1

Answer:

As volume of shere is 4/3πr^3

so on putting r =2.1 d π=22\7... we get

ans is 38.808

and surface area of sphere is4πr^2

on putting r=2.1 nd π=22/7..we get

ans is 55.44

Answer 2

Answer:

• Volume of sphere = 38.808 cm³
• Surface area of sphere = 55.44 cm²

Step-by-step explanation:

Given

• Radius of sphere = 2.1 cm

To find

• Volume
• Surface area

Solution

Volume of sphere = ⁴⁄₃ πr³

• ⁴⁄₃ × ²²⁄₇ × ²¹⁄₁₀ × ²¹⁄₁₀ × ²¹⁄₁₀
• 38.808

∴ Volume = 38.808 cm³

Surface area of sphere = 4πr²

• 4 × ²²⁄₇ × ²¹⁄₁₀ × ²¹⁄₁₀
• ¹³⁸⁶⁄₂₅
• 55.44

∴ Surface area = 55.44 cm²