Riya's present age is 5a years, and Arjun's present age is 7b years. Arjun is 4a years younger than Ankit. b years hence, the ratio of ages of Arjun and Ankit will be 5:8, and the age of Riya will be 70 years. Find the age of Riya 3 years ago.
1
53 years
2
35 years
3
57 years
4
45 years
5
63 years