A cuboidal wooden box has the inner dimensions
measures as 115 cm, 75 cm, 35 cm and the thickness
of wood is 2.5 cm. Then the volume of the wood
is
(a) 80,000 cu. cm (b) 82,125 cu. cm
(c) $4,000 cu. cm
(d) 85,000 cu. cm
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Correct option is B)
Given internal volume = 115 × 75 × 35 = 301875 cu cm
External measurements are
length = 115 + 2 × 2.5 = 120 cm
breadth = 75 + 2 × 2.5 = 80 cm
height = 35 + 2 × 2.5 = 40 cm
External volume = 120 × 80 × 40 = 384000 cu cm
Volume of wood = 384000 − 301875 = 82,125 cu.cm
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