Question

the volume of a right circular cone is 9856CM 2 if the diameter of a base is 28 CM , find
A. height of the cone
B. slant height of the cone
C. can of the cone

Answer 1

A) 48cm ✔️

B) 50cm ✔️

C) 2200cm^2 ✔️

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Answer 2

Step-by-step explanation:

Given :-

The volume of the right circular cone

= 9856cm^3

Diameter =28 cm

Radius = Diameter/2

Radius of the cone = 14cm

Solution 1 :-

Volume of the cone = 1/3πr^2h

Put the required values in the formula ,

9856 = 1/3 * 22/7 * 14 * 14 * h

h = 9856 * 3 * 7 / 22 * 14 * 14

h = 206976 / 4312

h = 48

Hence , The height of the cone is 48cm

Solution 2 :-

Radius of the cone = 14 cm

Height of the cone = 48cm

Now ,

( l )^2 = (radius)^2 + ( height )^2

Slant height ( l )^2 = √( 14)^2 + ( 48)^2

( l )^2 = 196 + 2304

( l )^2 = 2500

l = 50 cm

Thus , The slant height of a cone is 50 cm

Solution 3 :-

Total surface area of cone

Put the required values in the formula ,

TSA of cone = 22/7 * 14 ( 50 + 14)

TSA of cone = 22 * 2 * 64

TSA of cone = 2816 cm²