Question

Ages of ravi and henna is in ratio 5:7. Four years later their ages will be in ratio 3:4. Find their ages

Answer 1

let, the ages be X

so, ravi's age is 5x

" henna age be 7x

5x +4 / 7x+4 = 3/4

let, we doing cross multipication

(5x +4) 4 = (7x +4 )3

20x +16 = 21x + 12

20x +16 -12 = 21x

20x + 4 = 21x

4 = 21x - 20x

x= 4

5x = 5*4 = 20

Ravi's age is 20 years.

7x = 7*4 = 28

henna's age is 28 years.

" HOPE YOU UNDERSTAND".