Question

For three months, the salary of a person are in the ratio 2: 4:5. If the difference between the product of salaries of the first two months and last two months is 4,80,00,000; then the salary of the person for the second month will be:

Answer 1

let the salary of one month be 2x

let the salary of two month be 4 x

let the salary of 3 month be 5x

2x ×4x-4x×5x= 48000000

8x^2-20×^2=48000000

12x^2=48000000

x^2=48000000/12

x^2=4000000

x=4000000 is square root

x=40000

therefore second month 4x = 4 × 2000 is = 80000