The length and breadth of a cuboid are increased by 10% and 20%,respectively, and its height is decreased by 20%. The percentage increase in the volume of the cuboid is:
Answer & explanation
Correct answer: option 4
Volume of cuboid = Length × Breadth × Height
Ratio of dimensions of old to new cuboid,
old : New
Length 10 : 11
Breadth 5 : 6
Height 5 : 4
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Volume 250 : 264
Percentage increase in volume = \(\frac{14}{250}\) × 100
= 5\(\frac{3}{5}\)%