A room is in the shape of a cuboid, with dimensions 12 m 10 m 3 m. What is the cost of painting the four walls of the room at the rate of ₹50 per m?
Answer & explanation
Correct answer: option 3
We know that,
Area of four walls of room = 2 (l + b) × h
Dimension of cuboid = l × b × h = 12m × 10m × 3m
The area of four walls of room = 2 (12 + 10) × 3 = 132 m2
So, the cost of the painting wall of the room = 132 × 50 = 6600 Rs.