Question

The present ages of Pavan and Kalyan are in the ratio of 4:5. The product of their ages numerically is equal to 980. Find the difference between their ages (in years).

Answer 1

Let's assume that Pavan's age is 4x and Kalyan's age is 5x. According to the problem, the product of their ages is equal to 980. So we can write the equation: (4x)(5x) = 980. Solving for x, we get x = √(980/20) = 7. Therefore, Pavan's age is 4x = 28 and Kalyan's age is 5x = 35. The difference between their ages is 35 - 28 = 7 years.