Volume of Rectangular Solid Practice

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Question 1
Given a rectangular solid with the width of 5cm, length of 7cm and height of 4cm. Find the volume of this solid.

Answer

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A. 140
B. 140 cm
C. 140 cm2
D. 140 cm3
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Step by Step Solution 

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Step 1
The picture below shows the rectangular solid with the width (W) of 5cm, length (L) of 7cm, and height (H) of 4cm.
Rectangular solid W = 5cm, L = 7cm, H = 4cm

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Step 2
Since W, L and H have the same unit, we can just multiply the W, L and H together to find the volume as shown:
V = WLH
      = 5×7×4
 = 140

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Step 3
Now, the calculated number 140, has no meaning unless we include the unit for it. Since W, L and H units are in cm, the unit for volume will be cm3. Hence:
V = 140cm3
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Step 4
Therefore, the answer is D.

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