Ten years ago a's age was helf of b' s age .If the ratio of their parents age is 3:4 , what will be the sum of their parents ages?
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Let the present age of A and B be x and y .
A.T.Q.
x - 10 = (y-10)/2
2x - 10 = y
It's present age, I think and not Parents age.
3x = 4y ------------(ii)
x = 4y/3
putting value of x in eq.(i)
2×(4y/3) - 10 = y
8y/3 - y = 10
8y - 3y / 3 = 10
5y = 30
y = 30/5
y = 6
x = 4y/3
x = 4×6/3
x = 8
A's age = 8
B's age = 6
Sum of their ages = 8 + 6 = 14
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