Given: Age ratio of Rina and Babita (5 years before) =1:2 Ratio of their present age =7:9 Calculations: Let the present ages of Rina and Babita be 7x and 9x So, the ratio of their ages 5 years ago: (7x−5)∶(9x−5)=1∶2 ⇒14x−10=9x−5 ⇒x=1 ∴ The present age of Babita is 9 × 1 = 9 years