a hall is 17.5m long, 12.5m wide and 5m high find the area of its four walls and the area of its floor
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Answer:
518.75 m²
Step-by-step explanation:
Area of four walls = Lateral Surface Area
L.S.A of cuboid = 2h(l+b)
=> L.S.A. = 2 (5) (17.5+12.5) m²
=> L.S.A. = 10 (30) m²
=> L.S.A. = 300 m²
Area of floor = l×b = 17.5×12.5 m² = 218.75 m²
Total area = (300 + 218.75) m² = 518.75 m²
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518.75 m² is the right answer
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