The price of two article are as 3 : 4. If the price of the first article is increased by 10% and that if the second by ₹ 4 one original ratio remains the same. The original price of the second article is

₹ 40
₹ 10
₹ 30
₹ 35

Correct Answer: ₹ 40

Explanation:

Let cost prices of two article be 3N and 4N respectively then
(110% of 3N) / (4N + 4) = 3/4
⇒ 1.1N / (N + 1) = 1
⇒ 1.1N = N + 1
⇒ 0.1 N = 1
⇒ N = 10
Thus, cost price of the second article is 4 x 10 = ₹ 40

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