Practice30 Create account

A cone has radius 6 cm and height 8 cm. Using π = 3.14, find its curved surface area.

Class 9Surface Area of a ConeMensuration

A $301.44 cm^{2}$
B $188.4 cm^{2}$
C $150.72 cm^{2}$
D $113.04 cm^{2}$

Step-by-Step Solution

First

l

= √

(36 + 64) = 10

cm. CSA =

3.14 \times 6 \times 10 = 188.4 cm^{2}

. (150.72 uses the height 8 instead of

l

; 301.44 is the total surface area.)

Answer: B)

188.4 cm^{2}

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Surface Area of a Cone practice questions

More Class 9 Surface Area of a Cone practice

The base diameter of a cone is 10.5 cm and its slant height is 10 cm. Find its curved…A joker's cap is a cone of base radius 7 cm and height 24 cm. How much sheet is needed…Why do we use only the curved surface area (not the total surface area) for the sheet in…A conical tent is 10 m high and the radius of its base is 24 m. What is its slant height?An ice-cream wafer cone has radius 2.1 cm and slant height 5 cm. How much wafer is used…