Question

A birthday cap is of cone shape with base radius 7 cm and height 24 cm. The area of the colour sheet required to make 10 such caps is 5500 ${cm}^2$(Take $\Pi$= $\frac{22}{7}$)

• A. True
• B. False

Answer 1

The correct option is A

True

Given r = 7 cm h = 24

As we know $l^2$ = $h^2$ + $r^2$, Slant Height = 25 cm

So, Curved Surface area of each cap = $\Pi$rl = 550 ${cm}^2$

So, Area of paper required for 10 caps = 5500 ${cm}^2$