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, then how old is B ?

\par Let C's age be x years. then,

\par B's age = 2x years

\par A's age = (2x + 2) years

(2x + 2) + 2x + x = 27

5x = 25

x = 5

\par B's age = 2x = 10 years.