Question

ratio of present age of Shambhu and his sister is 5: 7 after 4 years from now this ratio will be 3: 4 find their present age​

Answer 1

Answer:

let their present age is5xyear and 7x years

after 4 years Shamnei will be (5x+4)years

his sister will be (7x+4) years

so,

5x+4 : 7x+4=3 : 4

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

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

=> 21x+12=20x+16

=> 21x-20x=16-12

=> x=4

so,present age of Shambhu is 5×4years=20years

present age of his sister is 7×4years=28years