the cost of papering four walls of a room at rs1.50 per square metre is rs 337.50 the height of the room is 5m find the length and bredth of the room if they are in the ratio 4: 1
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CSA of room = 240 / (75/100)
= 240 * 100 / 75
= 240 * 4 / 3 = 320 m2
CSA = 2(l + b) * h
2(5x + 3x) * 5 = 320
2(8x) * 5 = 320
80x = 320
x = 4 m
Length = 5 * 4 = 20 m
Breadth = 3 * 4 = 12 m
= 240 * 100 / 75
= 240 * 4 / 3 = 320 m2
CSA = 2(l + b) * h
2(5x + 3x) * 5 = 320
2(8x) * 5 = 320
80x = 320
x = 4 m
Length = 5 * 4 = 20 m
Breadth = 3 * 4 = 12 m
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