Question

Please answer fast and get 50 points help me
A rectangular room of dimension 8m x 6m x 3m is to be painted. If it costs ₹60 per square metre, find the cost of painting walls of the room.

Answer 1

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Dimension of a rectangular room = 8 m × 6 m × 3 m




Rate of painting = Rs. 60 per m²



For this purpose we have to calculate total surface area of rectanglular room.



Surface area of rectangular room = 2 ( 6 × 8 + 8 × 3 + 6 × 3 )



= 2 ( 48 + 24 + 18 )



= 2 ( 90 )


= 180 m²



Cost for painting = 180 × 60


= Rs. 10800



So the total cost of painting is Rs . 10,800

Answer 2

Given Dimensions of room are:

⇒ Length = 6m.

⇒ Breadth = 6m.

⇒ Height = 3 m.

∴ Area of four walls of the room = 2h(l + b)

⇒ 2 * 3(8 + 6)

⇒ 6(14)

⇒ 84 m^2.

Given cost per m^2 = 60.

Cost of painting the walls of the room at the rate of 60 per m^2:

⇒ 84 * 60

⇒ 5040.

Therefore, cost of painting the walls of the room = 5040.

Hope it helps!