Ten years ago, A was half of B in age. If the ratio of their present age is 3 : 4 What will be the total of their present ages?
ক
20years
খ
30years
গ
45years
ঘ
None of these
সঠিক উত্তর: None of these
Let their present ages be 3x and 4x, Then2(3x-10) = 4x - 102x = 10x = 5Sum of their present ages = 7x = 35