a classroom is 11 m long 8m wide and 5.5m high. find the sum of the areas of the four walls
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Answer:
LSA of cuboid = 2(l+b)h
= 2(11+8)5.5
= 2(19)5.5
= 2×104.5
= 209m^2
Area of rectangle = l×b
= 11×8
= 88m^2
Area of 4 walls and floor = 209+88
= 297
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