The present ages of two persons are in the ratio 15 : 17. Twenty-four years ago the ratio of their ages was 9 : 11. Find the present age of the older person.
Explanation:
Let their present ages be 15x and 17x years respectively.
Ratio of their ages 24 years ago:
15x-2417x-24=911
⇒ 165x – 264 = 153x - 216
⇒ 12x = 48
⇒ x = 4
∴ The age of the older person is 17 × 4 i.e., 68 years
Hence, option (d).
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