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Lateral Surface Area of a Cuboid

The length, b...

Question

The length, breadth and height of a room are in the ratio 3:2:1. If the breadth and height are halved while the length is doubled, then the total area of the 4 walls of the room will?

A

remain same

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B

decrease by

15 %

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C

decrease by

18 %

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D

decrease by

30 %

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Solution

The correct option is D decrease by $30 %$
Option (D) is the correct answer. Check the video for the approach.

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