Question

If the cost of a diamond varies directly with the square of its weight and if the weight of the
diamond is 5 grams, then the cost is Rs.1500. What will be the cost of 12 grams diamond?​

Answer 1

Question :

If the cost of a diamond varies directly with the square of its weight and if the weight of the

diamond is 5 grams, then the cost is Rs.1500. What will be the cost of 12 grams diamond?

Answer: Rs.8640

Answer 2

5 grms = ₹1500

12 grms = ₹x

• by cross multiplying , we get

(12)(1500) = 5x

x = 12 × 1500/5 = 12 × 300 = ₹3600

• The cost of 12 grams of Diamond is ₹3600

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