Cone-shaped 23331

For his birthday, Jirka made a cone-shaped hat out of paper. The side of this cone is 35cm long, and the radius of its base is 20cm. How much dm of paper did Jirka use to make it? Thank you

Correct answer:

x =  21.9911 dm2

Step-by-step explanation:

s=35 cm dm=35:10  dm=3.5 dm r=20 cm dm=20:10  dm=2 dm  x=π r s=3.1416 2 3.5=21.9911 dm2



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







Tips for related online calculators
Do you want to convert area units?
Do you want to convert length units?

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: