seanbugtai983
Answered

Discover answers to your questions with Westonci.ca, the leading Q&A platform that connects you with knowledgeable experts. Join our platform to connect with experts ready to provide accurate answers to your questions in various fields. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

Find the surface area of a right cone that has a radius of 9 inches and a height of 12 inches. Round your answer to the nearest hundredth.​

Sagot :

Answer:

SA= 678.24 in^2

Step-by-step explanation:

SA = (pi)(r^2) + (pi)(r)(l)

r = radius

h = height

l = slant height

Pi = 3.14

Slant height:

l^2 = h^2 + r^2

l = sqrt (144+81)

= 15

SA = (pi)(9^2) + (pi) (9) (15)

SA = 254.34 + 423.9

SA= 678.24 square inches

If the slant height of the cone is 15 inches. Then the surface area of the cone will be 678.58 square inches.

How do find the surface area of some object?

Find the area that its outer surfaces possess. The Sum of all those surface areas is the surface area of the considered object.

If a right cone has a radius of 9 inches and a height of 12 inches.

Then the surface area of a right cone will be

The slant height is given as

l² = 9² + 12²

l² = 81 + 144

l² = 225

l = 15

Then the surface area will be

Surface area = πr² + πrl

Surface area = π x 9² + π x 9 x 15

Surface area = 81π + 135π

Surface area = 216π

Surface area = 678.58 square inches

Learn more about the surface area here:

https://brainly.com/question/15096475

#SPJ2

Thanks for using our platform. We're always here to provide accurate and up-to-date answers to all your queries. Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Westonci.ca is your go-to source for reliable answers. Return soon for more expert insights.