Lampshade

The cone-shaped lampshade has a diameter of 30 cm and a height of 10 cm. How many cm2 of material will we need when 10% is waste?

Final Answer:

S =  934.4918 cm2

Step-by-step explanation:

D=30 cm v=10 cm  r=D/2=30/2=15 cm q=100%+10%=1+10010=1.1  s=v2+r2=102+152=5 13 cm18.0278 cm  S1=π r s=3.1416 15 18.0278849.538 cm2 S=q S1=1.1 849.538=934.4918 cm2



Help us improve the example. If you find a mistake, let us know. Thank you!







Tips for related online calculators
Our percentage calculator will help you quickly and easily solve a variety of common percentage-related problems.
See also our right triangle calculator.
See also our trigonometric triangle calculator.

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

algebraarithmeticsolid geometryplanimetricsbasic operations and conceptsUnits of physical quantitiesGrade of the word problem

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

Related math problems and questions: