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Question

The ratio of the present ages of Ram and Ramesh is 3 : 5. After 7 years the ratio of their ages will be 4 : 5. Find the present age of Ramesh.

A 5 years Correct Answer Incorrect Answer
B 12 years Correct Answer Incorrect Answer
C 15 years Correct Answer Incorrect Answer
D 7 years Correct Answer Incorrect Answer

Solution

Let the present age of Ram and Ramesh be 3x and 5x According to the question,  (3x + 7)/(5x + 7) = (4/5) ⇒ 15x + 35 = 20x + 28 ⇒ 35 - 28 = 20x - 15x ⇒ 5x = 7 ⇒ x = 7/5 So, the present age of Ramesh = 5 × (7/5) ⇒ 7 years

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