Question

Ami is 8 years elder to her brother Amith. If the ratio of their ages is 7:3. Then find the sum of their present age.

Answer 1

Let age of Ami be $x$ yrs

then his brother is $x-8$ yrs old

Now, $\frac{7}{3}=\frac{x}{x-8}\Rightarrow 7x-56=3x\Rightarrow x=14$

$x-8=14-8=6$

Sum of their age $=14+6=20yrs$