Question

The area of the base of a cone is $616$ sq.cm. Its height is $48cm$. What is its total surface area ?

• A. $2681{cm}^2$
• B. $2618{cm}^2$
• C. $2816{cm}^2$
• D. $2861{cm}^2$

Answer 1

Answer: (C)

We know, the base of a cone is circular.

Then, Area of a circle $=\pi r^2=616$.
$\Rightarrow r^2=\frac{616\times 7}{22}=196$
$=>r=14cm$.