Question

How many square metres of canvas are required for a conical circus tent whose height is $35$ metres and the radius of the base is $84$ metres?

Answer 1

Slant height $=\sqrt{{\left(84\right)}^2+{\left(35\right)}^2}$
$=\sqrt{8281}=91$ metres
Curved Surface of a cone $=\frac{22}{7}\times 84\times 91$
$=24024$ sq. metres