Question
A cuboidal room has dimensions of
15 meters, 12 meters, and 8 meters. The area of each sidewall exceeds the area of the front wall by 24 m². Calculate the cost of painting the ceiling of the room at a rate of Rs. 25 per/m².Solution
ATQ, Since, 15 × 12 = 180 m2 And, 12 × 8 = 96 m2 And, 15 × 8 = 120 m2 So, area of the side walls = 120 m2 And, area of front walls = 96 m2 Therefore, area of the floor/ceiling = 180 m2 Hence, cost of painting the ceiling = 180 × 25 = Rs. 4,500
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