Question

The cost of papering of four walls of a room at Rs. per is Rs. . The height of the room is m. If ratio of length and breadth of a room is , find them.

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Solution

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We are given,
Height of room

Let, length of room be and breadth of room be
Now, we are given that,

The cost of preparing of four walls is  

So, for one wall

The wall can be made of breadth and height

For cots

So, For how many cots

So, Area of one wall

But

So,

Now, let , where

&

but so,

so, length

so length & breadth are and respectively.

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