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प्रश्न
If the cost of a dozen soaps is Rs 285.60, what will be the cost of 15 such soaps?
उत्तर
Cost of dozen soaps = Rs 285.60
Cost of 1 soap = `285.60/12`
Cost of 15 soaps = 15 × `285.60/12 = 4284/12` = Rs 357
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