22. 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 ?
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let their present ages are 3x & 4x
ATQ
(3x-10)= 1/2(4x-10)
3x-10= 2x-5
x=5
their present ages 3x=15 & 4x=20
total = 15+20=35
let their present ages are 3x & 4x
ATQ
(3x-10)= 1/2(4x-10)
3x-10= 2x-5
x=5
their present ages 3x=15 & 4x=20
total = 15+20=35
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