Two identical solid cubes of side 5 cm are joined end to end. Then the total surface area of the resulting cuboid is:
Question and options
Two identical solid cubes of side 5 cm are joined end to end. Then the total surface area of the resulting cuboid is:
- 300 cm2
- 250 cm2
- 225 cm2
- 200 cm2
Answer and explanation
Correct answer: B - 250 cm2
The resulting cuboid is 10x5x5. TSA = 2(10*5 + 5*5 + 10*5) = 2(125) = 250 cm^2.
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