The total ages of A, B and C at present is 150 years. Ten years ago the ratio of their ages was 3 : 2 : 1 . Find the present age of B.
Answer & explanation
Correct answer: option 3
According to question,
A : B : C
3 : 2 : 1 ( 10 years ago )
Now, let age of C = X , age of B = 2x and age of A = 3x
x + 10 + 2x + 10 + 3x + 10 = 150
6x = 120
x = 20
present age of B = 2 × 20 + 10 = 50 years