The age of A and B ate in the ratio 5:7. Four years from now the ratio of their ages will be 3:4. Find the age of B.
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let ratio be 5xand7x
5x+4 /7x+4 = 3/4
20x+16= 21x+12
x=4
b age = 28yrs
5x+4 /7x+4 = 3/4
20x+16= 21x+12
x=4
b age = 28yrs
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