Question

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 1

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

Answer 2

518.75 m² is the right answer

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