The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased Â ?

The length, breadth and height of a room are in the ratio 7:3:1. If th

1.	The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased Â ?
A.	0.9
B.	0.88
C.	0.85
D.	0.84
Answer» B. 0.88

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The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased Â ?

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