A hall of 10 m length, 5 m width and 6 m height is to be painted (one side only). Determine the total surface area to be painted. (neglect the area of windows and doors)(floor area is NOT to be painted)
Answer & explanation
Correct answer: option 4
We know that,
Area of four walls = 2(l + b) × h
Area of roof = l × b
We have,
Length = 10 m
Width = 5 m
Height = 6 m
Area of four walls = 2 (10 + 5) × 6 = 2 × 15 × 6 = 180 m2
Area of roof = 10 × 5 = 50 m2
= Total surface area to be painted = 180 + 50 = 230 m2