Question

a rectangular room of dimension 8mx 6m x 3m is to be Painted. if it cost Rs. 60 per.m square, find the cost of Painting Only the walls.

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Answer 1

Answer:

Rs 7920.

Step-by-step explanation:

• the length of the room (l) is 8 m,

• the breadth of the room (b) is 6 m

and

• the height of the room (h) is 3 m.

The area of the walls that is to be painted is l b + b h + l b + b h

that is,  2( l b + b h)

= 2 ( 8 * 6 + 6 *3)

=2 ( 48 + 18)

= 2 (66)

= 132 m²

Given that the cost of painting 1 m² = Rs 60  

Now, the cost of painting  

132 m² = Rs 132 * 60

= Rs 7920.

Hence Rs 7920.