Storm and roof

The roof on the building is a cone with a height of 3 meters and a radius equal to half the height of the roof. How many m2 of roof need to be repaired if 20% were damaged in a storm?

Correct answer:

x =  3.1612 m2

Step-by-step explanation:

h=3 m r=h/2=3/2=23=1.5 m q=20%=10020=0.2  s=h2+r2=32+1.523.3541 m x=q π r s=0.2 3.1416 1.5 3.3541=3.1612 m2



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
The Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: