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Each of the length, breadth and height of a cuboid is decreased by 12 percent. What is the percentage decrease in the total surface area of…

3412Medium DSSSB TGT Computer Science 0 replies 1 views

Each of the length, breadth and height of a cuboid is decreased by 12 percent. What is the percentage decrease in the total surface area of the cuboid?

A20.24 percent
B24.78 percent
C18.92 percent
D22.56 percent

Correct answer: D

Explanation

New area = (0.88)² = 0.7744 of the old area, so the decrease is 1 − 0.7744 = 22.56 percent.

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