One year ago, the ratio of Gaurav’s and Sachin’s age was 6: 7 respectively. Four years hence, this ratio would become 7: 8. How old is Sachin?
Explanation:
Let Gaurav's and Sachin's ages one year ago be 6x and 7x years respectively.
∴ Gaurav's age 4 years hence = (6x + 1) + 4 = (6x + 5) years. Sachin's age 4 years hence = (7x + 1) + 4 = (7x + 5) years.
⇒ 6x+57x+5 = 78
⇒ 48x + 40 = 49x + 35
⇒ 5 = x
∴ Sachin's present age = (7x + 1) = 36 years.
Hence, 36,
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