Question

Find the total surface area of a cone, if its height is 5 cm and the radius

of its base is 12 cm.​

Answer 1

Answer:

${65\pi \: cm}^{2}$

Step-by-step explanation:

The curved surface area of a cone is πrl, where r is the

radius and l is slant height

We need to calculate slant height, it can be done by using the formula l² = r² + h², where h is heigho;

So, l = root r² + h² = root 5² + 12² = 13

We have curved surface area of a cone is πrl =π×5×13 =65π cm²

Hence, the answer is 65π cm².