The length of cinema hall is 20m and breadth is 16m.The sum of the area of roof and four walls is equal.Find the height and volume of the hall.

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Solution

Solution-: Given length of roof or floor = 20 cm and breadth of roof or floor = 16cm we need to find height say ' h' Given areas of floor and flat roof = sum of areas of the four walls 2( lengthbreadth)=2( length +breadth)height 2(lb) = 2(l + b)h 2(20)(16)) = 2(20 + 16)h 640 = 72h 72h = 640 h = 640/72 h = 8.89 cms (nearly)

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