Question bank / Area and volume

Math · Geometry and TrigonometryEasy

An aquarium shaped like a rectangular prism is 6060 centimeters long and 3030 centimeters wide. When completely full, it holds 54,00054{,}000 cubic centimeters of water. What is the height, in centimeters, of the aquarium?

A

3030

B

600600

C

900900

D

1,8001{,}800

Show answer and explanation

Answer: A

Volume equals length times width times height, so 54,000=60×30×h=1,800h54{,}000 = 60 \times 30 \times h = 1{,}800h. Dividing both sides by 1,8001{,}800 gives h=30h = 30 centimeters.

Choice B divides the volume by 60+30=9060 + 30 = 90, but the area of the base is the product 60×3060 \times 30, not the sum.

Why the other choices are wrong

  • B. This divides by 60 + 30. The area of the base is 60 × 30.
  • C. This divides the volume by the length only.
  • D. This divides the volume by the width only.
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