3D Shapes: Quiz 8 - Answers
Part 1
1)
a) 524 cm3
b) 314 cm2
2)
a) 1,440 cm3
b) 616 cm2
3)
a) 288π cm3
b) 144π cm2
4)
a) 2,395.1 cm3
b) 865.7 cm2
Part 2
1)
a) 9 cm
b) 324π cm2
2)
a) 4.475 cm
b) Accept 251 to 253 cm2
3)
a) 8cm
b) 2,145 cm3
4)
a) 8.1 cm
b) Any answer between 2,225 and 2,230 cm3
You may use a calculator for all of the questions in this quiz.
Part 1
1) There sphere below has a radius of 5 cm.
b) What is the surface area of the sphere? Give your answer to 3 significant figures.
2) There sphere below has a radius of 7 cm.
b) What is the surface area of the sphere? Give your answer to 3 significant figures.
3) There sphere below has a radius of 6 cm.
b) What is the surface area of the sphere? Give your answer in terms of π.
4) There sphere below has a radius of 8.3 cm.
b) What is the surface area of the sphere? Give your answer to one decimal place.
1) A sphere has a volume of 972π cm3.
a) What is the radius of the sphere?
b) What is the surface area of the sphere? Give your answer in terms of π.
2) A sphere has a volume of 375.4 cm3.
a) What is the radius of the sphere? Giver your answer to 3 decimal places.
b) What is the surface area of the sphere? Give your answer to the nearest integer.
3) A sphere has a surface area of 256π cm2.
a) What is the radius of the sphere?
b) What is the volume of the sphere? Give your answer to the nearest integer.
4) A sphere has a surface area of 825 cm2.
a) What is the radius of the sphere? Give your answer to one decimal place.
b) What is the volume of the sphere? Give your answer to the nearest integer.