D. Solve the following problems and choose the letter of the correct answer.
21. A pyramid is 3 m by 3 m at the base and 5 m high. How much air can it contain?
A. 45 m3
B. 15 m3
C. 12 m
D. 9 m3
22. A conical pile of sand is 3 m in radius and 5 m in height. How many cubic meter of sand is this?
A. 47.1 m3
B. 15.7 m
C. 141.3 m
D. 235.5 m
23. A can of milk has a diameter of 10 cm and a height of 12 cm. Find its volume.
A. 188.4 cm
B. 376.8 cm3
C. 188.4 cm
D. 942 cm
24. What is the volume of a ball if its radius is 3 cm?
A. 113.04 cm3
B. 113.03 cm
C. 112.04 cm3
D. 112.03 cm
25. An aquarium is 25 cm long 15 cm wide and 20 cm high. How much water can it hold?
A. 2 500 cm3
B. 4 500 cm3
C. 6 000 cm
D. 7500 cm3
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Answer:
21. B
22. A
23. B
24. A
25. D
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