The length, breadth and height of a room is 15 m, 9 m and 5 m, respectively. From each can of paint 40 square metre of area is painted. How many cans of paint will be needed to paint only the walls of the room?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 6.
Area of four walls = 2(l + b) × h
Where l is length, b is breadth and h is height.
According to the given question,
Area to be painted = 2(15 + 9) × 5
⇒ 48 × 5 = 240
40 square meter area is painted by 1 can,
Number of cans needed to paint 240 square meters = 240/40
⇒ 6