The cost of a piece of jewellery is proportional to the square of its weight. A piece of jewellery weighing 10 grams is INR 3600. The cost of a piece of jewellery of the same kind weighing 4 grams is
Question and options
The cost of a piece of jewellery is proportional to the square of its weight. A piece of jewellery weighing 10 grams is INR 3600. The cost of a piece of jewellery of the same kind weighing 4 grams is
- INR 1220
- INR 600
- INR 576
- INR 1440
Answer and explanation
Correct answer: C - INR 576
Cost = k w^2: 3600 = 100k so k=36; cost for 4 g = 36*16 = 576.
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IPMAT Indore
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