A classroom wall of size 6 m × 3 m is to be covered using cuboid-shaped foam panels of size 2 m × 1 m × 0.1 m (thickness irrelevant). How many such panels are needed to cover the wall completely?
Show answer & explanation
Correct answer: C
Explanation
Given:
Dimensions of the wall = 6 m × 3 m
Dimensions of the panel = 2 m × 1 m × 0.1 m
According to the formula:
Number of panels = (Area of the wall) / (Area of one panel)
Area of the wall = 6 × 3 = 18 m²
Area of one panel = 2 × 1 = 2 m²
Number of panels = 18 / 2 = 9