the area of four walls of a room is 51.2m^2 it's length and breadth are 4.2 m and 3m, respectively. find the height of the room
(of chapter surface area and volume of solids )
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Answer:
3.55 m
Step-by-step explanation:
area of four walls = 2(lh+bh)
51.2m^2 = 2( (4.2×h) + (3×h ) )
51.2m^2 = 2(4.2h + 3h ) = 14.4 h
51.2m^2 = 14.4 h
51.2m^2/14.4 = h
height = 3. 55 m
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