Question Details

The radius of a solid right circular cone is 24 cm and its height is 32 cm. The total surface area of the cone is:

Options

A

576π cm2

B

1536π cm2

C

960π cm2

D

1728π cm2

Show Answer

Correct Answer :

Option C

960π cm2

960π cm2

Solution :

The correct answer is 960π cm2.

To find the surface area of the solid right circular cone, we first need to determine its slant height using the given radius and height.

Step 1: Identify the given dimensions
Radius of the cone (r) = 24 cm
Height of the cone (h) = 32 cm

Step 2: Calculate the slant height (l)
The slant height of a right circular cone is given by the Pythagorean theorem:
l=r2+h2
Substituting the given values:
l=242+322
l=576+1024
l=1600
l=40 cm

Step 3: Calculate the curved (lateral) surface area
The curved surface area (CSA) of a cone is given by the formula:
CSA=πrl
Substituting the values of the radius and the calculated slant height:
CSA=π2440
CSA=960π cm2
Thus, the curved surface area corresponding to the correct option is 960π cm2.

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