If the sum of the volumes of two shapes is equal to the volume of the third shape, which of the following options is correct?
Note: Consider the volume of the unit cube used in all 3 shapes is of volume 1 cu m.
A
Shape A + Shape B = Shape C
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B
Shape A + Shape C = Shape B
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C
Shape C + Shape B = Shape A
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D
Shape B + Shape A = Shape C
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Solution
The correct option is B Shape A + Shape C = Shape B Number of cubes in Shape A = Number of unit cubes in the base layer × Number of layers =2×2=4cubes
Volume of Shape A =4 cu m
Number of cubes in Shape B = Number of unit cubes in the base layer × Number of layers =4×3=12 cubes
Volume of Shape B =12 cu m
Number of cubes in Shape C = Number of cubes in the base layer × Number of layers =4×2=8 cubes
Volume of Shape C =8 cu m
So clearly, 4 cu m +8 cu m =12 cu m
Therefore, Shape A + Shape C = Shape B
Thus, Option C is correct.