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HELPPP ASAP IM AWARDING 80 POINTS!!!!

A cylindrical candle has a radius of 4 cm and a height of 10.4 cm.

What is the exact surface area of this candle?


32.0π cm²


83.2π cm²


91.2π cm²


115.2π cm²

User Emazzotta
by
8.0k points

2 Answers

3 votes

Answer: The answer is D, 115.2π cm²

Step-by-step explanation: When we use the formula of 2πrh+2πr2=2·π·4·10.4+2·π·42 to get the surface area, which equals 361.91

We can divide this by pi to get 115.2π cm²

Hope this helped!

User LBarret
by
7.9k points
1 vote

Answer:

D) 115.2π cm².

Explanation:

The surface area of a cylinder can be calculated using the formula:

Surface Area = 2πr² + 2πrh

where r is the radius and h is the height of the cylinder.

In this case, r = 4 cm and h = 10.4 cm. Substituting these values in the formula, we get:

Surface Area = 2π(4)² + 2π(4)(10.4)

Surface Area = 2π(16) + 2π(41.6)

Surface Area = 32π + 83.2π

Surface Area = 115.2π

Therefore, the exact surface area of the candle is 115.2π cm².

The answer is (D) 115.2π cm².

User Christian Hujer
by
8.4k points

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