Concept explainers
Find the amount of paper needed to make the drinking cup.
Answer to Problem 2STP
F
Explanation of Solution
Given:
A machine is making steel washers by cutting out 10-millimeter circular disks from 34-millimeter circular disks .
Formula Used:
Lateral surface area of a cone with slant height l and radius r :
Calculation:
The paper needed to make the conical glass is equal to the lateral surface area of the cone.
The radius, r of the cone is 2.5 cm
The height , h of the cone is 9 cm
Find the slant height , l of the cone :
So, the Lateral surface area of the cone is :
So, the correct option is F.
Chapter 13 Solutions
Geometry, Student Edition
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