A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?
7
8
9
10
Explanation:
Let Cs age be $ x $ years. Then, Bs age = 2$ x $ years. As age = $\left(2x + 2\right)$ years.
$\therefore$ $\left(2x + 2\right)$ + 2$ x $ + $ x $ = 27
$\Rightarrow$ 5$ x $ = 25
$\Rightarrow x $ = 5.
Hence, Bs age = 2$ x $ = 10 years.