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NASA is painting the nose cone of a sounding rocket with a special sealant which reduces the air-drag on the rocket. If they need to do two coats of the sealant, how many square feet are they painting? Use π = 3.14.A. 56.5 ft²B. 27.3 ft²C. 35.3 ft²D. 28.3 ft²

NASA Is Painting The Nose Cone Of A Sounding Rocket With A Special Sealant Which Reduces The Airdrag On The Rocket If They Need To Do Two Coats Of The Sealant H class=

Sagot :

In order to determine the number of required square feet to paint the nose cone, use the following formula for the surface area of a cone without the base:

[tex]S=\pi rl[/tex]

where

r: radius of the base of the cone = 3 ft

l: slant height of the cone = 6 ft

replace the previous values of the parameters into the formula for S and simplify:

[tex]S=(3.14)(3ft)(6ft)=56.5ft^2[/tex]

Hence, 56,5ft^2 are required

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