Question
A shopkeeper plans to wrap a rectangular gift box with gift
paper. The dimensions of the box are 15 cm × 12 cm × ‘a’ cm. The cost of wrapping the gift is Rs. 9504, given that the price of the gift paper is Rs. 12 per cm². Determine the value of ‘a’.Solution
Total surface area of rectangular box = 9504/12 = 792 cm 2
According to question,
2 (15 × 12 + 12a + 15a) = 792
180 + 27a = 396
27a = 216, a = 8
So, the value of ‘a’ = 8 cm
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