Question

Present ages of Lara and Sara are 16 years and 11 years respectively. After how many years the ratio of their ages will become 4:3 ?

Answer 1

Answer:

Present age of Vatsala =14 years

Present age of Sara =10 years

Let after x years, ratio of their ages will become 5:4

Age of Vatsala after x years =14+x years

Age of Sara after x years =10+x years

Now,

10+x

14+x

=

4

5

Cross multiply:

4(14+x)=5(10+x)

56+4x=50+5x

56−50=5x−4x

6=x

Therefore, after 6 years, ratio of their ages will become 5:4