Mathematics
NULL
Medium
Question
An open box has outer dimensions 52 cm, 40 cm and 29 cm, with thickness 2 cm. If 1 cm³ of metal weighs 0.5 g, the weight of the box is ________?
A
8.56 kg
B
7.76 kg
C
7.756 kg
D
6.832 kg
✓ Official correct answer
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A
8.56 kg
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B
7.76 kg
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C
7.756 kg
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D
6.832 kg
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Explanation
Inner size 48 × 36 × 27. Metal volume = 52×40×29 − 48×36×27 = 13664 cm³. Weight = 13664 × 0.5 g = 6.832 kg.