geometry

12. Find the volume of the cylinder in terms of pi. The diagrams are not drawn to scale. h=8 in. and r=4 in.

~256 pi in.3
~128 pi in.3 *****
~64 pi in.3
~32 pi in.3

14. What is the volume of the composite space figure to the nearest whole number? The figure is not drawn to scale. 3cm,8cm,2cm,5cm,6cm

~210 cm3
~180 cm3
~120 cm3
~60 cm3 *****

17. A rectangular pyramid fits exactly on top of a rectangular prism. The prism has a length of 15 cm, a width of 5cm, and a height of 7cm. The pyramid has a height of 13cm. Find the volume of the composite space figure.

~1,500 cm3
~500 cm3
~975 cm3 *****
~850 cm3

18. Radius of 60 m

~3,600 pi m2 *****
~7,200 pi m2
~10,800 pi m2
~14,400 pi m2

19.A spherical balloon has a circumference of 19cm. What is the approximate surface area of the balloon to the nearest sqaure centimeter?

~115 cm2
~460 cm2 ****
~361 cm2
~1,134 cm2

20. What is the volume of the sphere? Round the answer to the nearest cubic unit. 16cm

~268 cm3
~2,145 cm3
~17,157 cm3
~536 cm3 *******

21. The volume of a sphere is 3,000 pi m3. What is the surface area of the sphere to the nearest square meter?

~688 m2
~1,079 m2 ******
~2,158 m2
~3,167 m2

24. What is the scale factor of a cube with volume 343 ft.3 to a cube with volume 2,744 ft.3?

~49:196 ****
~1:2
~2:1
~1:8

28. Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 15 feet by 15 feet by 3 inches for a patio if the concrete costs $46.00 per cubic yard?

~$431.25
~$2587.50
~$95.83 ******
~$2875.50

30. What is the volume of a square pyramid with base edges of 40 cm and a slant height of 25 cm?

~533.3 cm3 *****
~8,000 cm3
~12,000 cm3
~24,000 cm3

31. What is the slant height of the cone to the nearest whole number? The figure is not drawn to scale. 17m, 9m

~2,304 cm3
~4,608 cm3
~6,912 cm3
~13,824 cm3 ******

32. What is the maximum volume of a square pyramid that can fit inside a cube with a side length of 24 cm?

~2,304 cm3 ******
~4,608 cm3
~6,912 cm3
~13,824 cm3

need someone to check my answers and to help me if they are wrong

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  1. 12. correct
    14. can't tell what shape you have
    17. NO
    18. correct, if I assume you are finding area. Did not say
    19. NO
    20. is 16 the radius or the diameter? Either way your answer does not match
    either case.
    21. NO
    24. NO, the ratio of sides of similar solids equals the ration of the cube root of their volumes
    25. correct
    30. NO
    31. no figure, can't tell
    32. NO

    Wow, looks like some serious study ahead and learning
    the formulas.

    1. 👍 0
    2. 👎 1
    posted by Reiny

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