Concept explainers
To calculate approximate surface area of a cone
Answer to Problem 40E
319 m2
Explanation of Solution
Given information:
Height( h ) of the cone is 14.5 meters
Base diameter( d ) of the cone is 10 meters
Formula used:
The diameter of base of cone( d ) =
Surface area of a cone( S )
Calculation:
substituting the value of base diameter of cone to find base radius( r ) of cone
10
answer is-
r =5
substituting the value of radius( r ) and height( h ) in the cone formula to find surface area of the cone
S
nearly answer is
m2
Hence, approximate answer is
=319 m2
Base diameter of cone is looks like diameter of
Value of pi upto 2 decimal points is 3.14
Square of 14.5 is 210.25
Square root of 235.25 upto 2 decimal points is 15.33
Chapter 10 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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