#### Question

Choose the correct alternative answer for each of the following questions.

(4) Find the curved surface area of a cone of radius 7 cm and height 24 cm.

(A) 440 cm

^{2 }(B) 550 cm

^{2}(C) 330 cm

^{2 }(D) 110 cm

^{2 }

#### Solution

(4)Radius of the cone, *r* = 7 cm

Height of the cone, *h* = 24 cm

Let *l* be the slant height of the cone.

\[l = \sqrt{r^2 + h^2} = \sqrt{7^2 + {24}^2} = \sqrt{49 + 576} = \sqrt{625}\] = 25 cm

∴ Curved surface area of the cone = \[\pi r l = \frac{22}{7} \times 7 \times 25\] = 550 cm^{2}

Is there an error in this question or solution?

Solution Choose the Correct Alternative Answer for Each of the Following Questions.(4) Find the Curved Surface Area of a Cone of Radius 7 Cm and Height 24 Cm.(A) 440 Cm2 (B) 550 Cm2 (C) 330 Cm2 (D) 110 Cm2 Concept: Problems Based on Areas and Perimeter Or Circumference of Circle, Sector and Segment of a Circle.