Question

Multiple Choice. Choose the letter of the correct answer
1. What is the surface area formula of a sphere?
a. πr². b. 2πr²
c. 3πr² d. 4πr²

2. Find the surface are of a sphere whose radius is 3 dm.
a. 56.52 dm²
b. 113.04 dm²
c. 169.56 dm²
d. 226.08 dm²

3. What is the surface area formula of a cone??
a. πr² + πrs b. πr² - πrs
c. πr² x πrs d. πr² ÷ πrs

4. What does s stand for in the surface area formula of a cone?
a. side b. sphere
c. slant height d. surface

5. The formula for finding the surface area of a cylinder.
a. πr² + πrh
b. πr² + 2πrh
c. 2πr² + πrh
d. 2πr² + 2πrh

6. In the surface area formula of cylinder, 2Πr is what?
a. area
b. surface area
c. circumference
d. diameter

7. If the cone and cylinder have the same radius and height, which surface area is greater?
a. cone c. both a and b
b. cylinder d. none​

Answer 1

Answer:

answer of first question is πr2