Mathematics, 26.10.2019 04:43 taylor5384

Acone has a diameter of 7 cm and a slant height of 15.5 cm. what is the surface area of the cone?

apply this formula: sa = πr2 + πrl

1. find the radius of the measure: r =
d
2
=
7
2
= 3.5 cm

2. substitute measures into the formula: sa = π(3.52) + π(3.5)(15.5)

3. simplify the power and multiply: sa = 12.25π + 54.25π

4. add to simplify: sa =
π cm2

Answers: 1

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Acone has a diameter of 7 cm and a slant height of 15.5 cm. what is the surface area of the cone?