# math

The lateral area of a cone is 400 pi cm^2. The radius is 10 cm. Find the slant height to the nearest tenth.

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1. well, a = πrs, so s = a/(πr) = 400π/10π = 40.0

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oobleck
2. oobleck is correct. I took a quiz with this question and it is 40. Thx oobleck!

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3. GEOM B U6 L3 Surface Areas of Pyramids and Cones
1. A, 24

2. B, pentagon

3. A, 76 m²; 244 m²

4. B, 671 m²; 725 m²

5. A, 216π in.²

6. A, 72 ft²

7. C, 650 m²

8. C, 6.9 mm

9. D, 19 m

10. A, 40 cm

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4. Yeah, whoever is above me(no idea how to abbriviate that name lol) is correct.

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5. his answer is definitely right! Just took the quiz, and got 100%!! Thank you!!

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6. I personally had a question the same but with different numbers. it was 603 pi cm^2 LA and radius 26 cm. the answer was 23.2

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7. Surface areas of pyramids and cones quiz
1. Use Euler's formula...V=14..E=36.. answer= a-24
2. Pierre built the model.. answer=b-pentagon
3. Use formulas to find... answer= a- 76m^2; 244m^2
4. Use formula to find... answer= b-671m^2; 725 m^2
5. Find the surface area...cylinder... answer= a- 216 pi inches^2
6. for the following question...surface area...regular pyramid.. answer= a- 72ft^2.
7. for the following question...surface area.regular pyramid..answer=c-650m^2
8. Find the slant height... pyramid...answer=c=6.9mm ...haha 69