Question
The present average age of Nisha and Arav is 36 years.
After 4 years, their ages will be in the ratio 9:11. Find Arav’s age 7 years ago.Solution
ATQ,
let present ages be (9x − 4) and (11x − 4). (9x − 4) + (11x − 4) = 36 × 2 20x − 8 = 72 20x = 80 x = 4 Required age of Arav = (11x − 4) − 7 = (11 × 4 − 4) − 7 = 33 years
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