A room is 9M long and 7m board it has one door measuring 1.5 m *1 m the cost of painting the walls of the room at rs 50 per square metre is rupees 7925 find the height of the room
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area of 4 walls=7925/50=158.5sqm
158.5=2 (l+b)h-1.5×1
158.5=2 (9+7)h-1.5
158.5=32h-1.5
32h=160
h=160/32
h=5m
158.5=2 (l+b)h-1.5×1
158.5=2 (9+7)h-1.5
158.5=32h-1.5
32h=160
h=160/32
h=5m
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