A classroom is of length 7m, breadth the 6m and height 3m. Find the surface area of the
four walls (Including the area of door and windows).
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Step-by-step explanation:
A classroom is in a shape of cuboid.
l=7m b=6m h=3m
LSA(Lateral Surface Area) of cuboid=2(bh+hl)
=2(6×3+3×7)
=2(18+21)
=2×39
=78 m²
The surface area of the four walls of the classroom is 78 m²
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