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The total price of 12 ice-candies and 15 ice-cones is Rs. 690 and the total price of 20 ice - cones and 7 ice - candies is Rs. 740. By what percentage the price of an ice-cone is more than the price of an ice - candy?

The total price of 12 ice-candies and 15 ice-cones is Rs. 690 and the total price of 20 ice - cones and 7 ice - candies is Rs. 740. By what percentage the price of an ice-cone is more than the price of an ice - candy? Correct Answer 50

Let the price of an ice-candy and the price of an ice- cone be Rs. A and Rs. B respectively.

Given,

⇒ 12A + 15B = 690

⇒ 4A + 5B = 230

⇒ 7A + 20B = 740

Solving,

⇒ 7A + 20B = 740

⇒ 16A + 20B = 920

Subtracting,

⇒ 9A = 180

⇒ A = 20

⇒ B = (230 - 4 × 20)/5 = 30

Required percentage

⇒ 30 = 20 + 20 × ?/100

⇒ 10 = ?/5

⇒ ? = 50%

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