Question

Quantitative Aptitude
66. Ratio of ages of A, B, C, D and E is 4 : 5:6:7: 8. If
sum of the ages of B, C and D is 60 years more than
the sum of ages of A and E. What is the ratio of their
ages after 10 years?​

Answer 1

Ten years before : let the age of A and B was 3x and 5x respectively.

So the present age of A and B is 3x+10 and 5x+10

Now, (3x+10)/(5x+10) = 2/3

Or, 9x+30=10x+20

Or, x=10

So present age of A= (3x+10)= 30+10 = 40

And present age of B = (5x+10) = 50+10= 60

Difference between their age = 60-40 = 20

Answer is 20.