the age of A and B in the ratio 5 : 7. four years from now the ratio of their ages will be 3:4. find the age of A and B
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Answered by
0
Answer:
Let the ratio be 5x:7x.
Age of A after four years = 5x+4
Age of B after four years = 7x+4
According to Question,
5x+4/7x+4 = 3/4
=> 4 (5x+4) = 3 (7x+4)
=> 20x + 16 = 21x + 12
=> 16 - 12 = 21x - 20x
=> x = 4
Hence, present age of A = 20 years
Present age of B = 28 years
Answered by
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Answer:
let the common ratio is x
age of A is 5x
age of B 8s 7x
after 4 years ,age if A is 5x+4
after 4 years ,age if B is 7x+4
so
(5x+4):(7x+4)=3:4
(5x+4(/(7x+4)=3/4
3(7x+4)=4(5x+4)
21x+12=20x+16
21x-20x=16-12
x=4
the age of A is 5×4 years =20 years
the age of B is 7×4years=28 years
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