Question
The respective ratio of the present ages of A and B is
4:5. The present age of C is 20% more than that of B. The sum of the present ages of A, B and C is 60 years. What will be the ratio of the ages of A and B after 12 years?Solution
Let the present ages of A and B be 4x years and 5x years, respectively. Therefore, present age of C = 1.2 × 5 = 6x years According to the question, 4x + 5x + 6x = 60 15x = 60 Or, x = 60/15 = 4 Therefore, required ratio = (4x + 12):(5x + 12) = 28:32 = 7:8
If the first term of the arithmetic progression is 18, the common difference is 5, and the number of terms in the series are 40, then find the sum of th...
73920, 9240, ?, 220, 44, 11
If 2, 7, 20, x , 110, 235,
Then, 7 x + 7√x = ?
53 ? 55 49 57 47
...45 47 97 296 ? 5966
8 9 22 75 316 ?
...If 4 x 4 7 15 38.5
Then, ( x + 1) ( x - 1) = ?
...D irection: Which of the following will replace ‘?’ in the following series
460, 462, ‘?’, 467.5, 470.97
...If 152, 242, x , 332, 404, 314,
then find the value of (2x – 1)?
...24, 33, 50, ?, 108, 149
