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Determine the surface area and volume

Determine the surface area and volume-example-1
User Ravi G
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1 Answer

3 votes

Answer:

surface area=214cm2, volume=183 cm3

Explanation:

slanted height=√5^2+7^2 (Pythagoras theorem)

= √74

area of bottom part=π(5)^2

=25π

area of top cone part=π(5)(√74)

surface area of cone=25π+π(5)(√74)

=214 cm2(to 3 s.f.)

volume of cone=1/3π(5)^2×7

=183 cm3(to 3 s.f.)

User Xavier Holt
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