সব প্রশ্নে ফিরে যান
Math
The total age of A, B and C is 90 years. Ten years ago the ratio of their ages was 1 : 2 : 3. What is the present age of B?
A) 40 years
B) 30 years
সঠিক উত্তর
C) 20 years
D) 18 years