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youre making three party hats. how much paper will we need , if the radius is 4 inches and slant height 5 inches to the nearest tenth

User Billy Boyo
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1 Answer

3 votes

Answer:


60\pi\approx188.5in^2

Step-by-step explanation:

The party hats are cones without the base. The formula for the curved area of a cone is:


A=\pi rl

Where:

• r is the radius

,

• l is the lenght of the slant heigth,

Then:


A=\pi\cdot4in\cdot5in=20\pi\approx62.83in^2

We want to make 3 of them, thus:


20\pi\cdot3in^2=60\pi in^2\approx188.5in^2

User Husman
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