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Previous Year Paper

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CAT-2006-Previous Years Paper

Question
5 out of 25
 

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



A remain the same

B decrease by 13.64%

C decrease by 15%

D decrease by 18.75%

E decrease by 30%

Ans. E

Area of 4 walls = 2 H(L + B)

Assume that the length, breadth and height of the room is 30 units, 20 units and 10 units.

Initial total area of the four walls = 2 × 10 (50) =
1000 sq. units

After the changes, new length = 60 units, new breadth = 10 units and height = 5 units

So, new total area of the four walls = 700 sq. units

So, area decreases by 30%.

CAT-2006-Previous Years Paper Flashcard List

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