Question

Need help asap The answer is 100 or 126​

Answer 1

The surface area of the cone is 126π cm².

Explanation:

The surface area of a cone can be found using this formula:

• 
  `\text{SA} = \pi r ^2+\pi r l`
• where r = radius and l = slant height

In this problem, we are told that the cone has a radius of 9 cm and a slant height of 5 cm.

Substitute these values into the formula for the surface area of a cone.

• 
  `\text{SA}= \pi (9)^2+ \pi(9)(5)\\`
• 
  `\text{SA}= \pi (81)+ \pi(45)`
• 
  `\text{SA}= 126 \pi`

The surface area of the right cone is 126 π cm².