Question
The ratio between the present age of Beena and Meenal is
5:6, where Sumit is 2 years younger than Meenal then find the ratio of their ages 5 years hence.Solution
Let present age of Beena be 5x years and of Meenal of 6x years. According to the question, => 5x = 6x – 2 => x = 2 Present age of Beena = 5 × 2 = 10 years Present age of Meenal = 6 × 2 = 12 years Now, 5 years hence their ratio of ages, Beena age = 10 + 5 = 15 years Meenal age = 12 + 5 = 17 years Required ratio = 15:17
Let A be a 3 × 3 matrix such that |A ∣ =4. Then ∣ adj(adj(A)) ∣ equals:
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