SOLUTION: The surface of a balloon varies directly as the square of its radius. The area is {{{314 cm^2}}} when the radius is 5 cm. What is the area when the radius is 10 cm?
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-> SOLUTION: The surface of a balloon varies directly as the square of its radius. The area is {{{314 cm^2}}} when the radius is 5 cm. What is the area when the radius is 10 cm?
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Question 235351: The surface of a balloon varies directly as the square of its radius. The area is when the radius is 5 cm. What is the area when the radius is 10 cm? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! The surface of a balloon varies directly as the square of its radius.
The area is 314 sq/cm when the radius is 5 cm.
What is the area when the radius is 10 cm?
:
If it varies directly as the square, when the radius is doubled the surface area is times 4
4 * 314 = 1256 sq/cm
;
:
You can check this using the surface area formula
S.A = 4*pi*10^2 = 1256.6
