Question

A classroom is 12m long, 9m wide and 5m high .Find the sum of the areas of its floor and four walls including windows( with full explanation)

Answer 1

Answer:

  Dimensions of class room = 12m × 9m × 5m Where, Length = 12m, Breadth = 9m, Height = 5m We know, Area of floor = length × breadth = 12 × 9 = 108 m2 Area of four walls (including doors & windows) = 2 (lh + bh) cm2 = 2 (12×5 + 8

9×5) = 2 (45 + 60) = 2 (105 ) = 210m2

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