The length of a hall is 20 meter and breadth 16 meter . The sum of the area of floor and flat roof is equal to sum of area of the four wall . Find the height of hall
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Area of floor = l × b
= (20 × 16) m^2
= 320 m^2
Area of floor = Area of flat roof
Area of floor + Area of flat roof = L.S.A of room
( 320 + 320 ) m^2 = L.S.A of room
640 m^2 = L.S.A of room
L.S.A of room = 2( l+ b ) × h
640 m^2 = 2 ( 20 + 16 ) × h
640 m^2 = 2 × 36 × h
640 /72 = h
→ h = 8.88 m
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