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A grain silo, shown below, is in the sha...

A grain silo, shown below, is in the shape of cylinder with a half sphere on top . The radius of the base of the cylinder is 10 feet , and the height of the cylindrical part is 60 feet, as marked

The farmer who owns the silo plans to apply a coat of paint to the cylindrical exterior . This does not include the spherical top . A formula for the lateral surface area S of a cylinder with radius r and height h is `S=2pirh`. if one can of paint covers 300 square feet of surface, what is the least number of cans that the farmer must buy to complete the job ?

A

10

B

11

C

12

D

13

Text Solution

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The correct Answer is:
D
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ENGLISH SAT-ADDITIONAL TOPICS IN MATH -PRACTICE TEST
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  12. A grain silo, shown below, is in the shape of cylinder with a half sph...

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  14. In the figure shown above, angleQ measures 70^@ , bar(PQ)cong bar(PR) ...

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