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Three years ago, the ratio of ages of A and B was 7:1. After three years from noww, the ratio of their ages will be 7:5 What is the difference between their ages (in years) after seven years from now?.
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Step-by-step explanation:
3 yrs ago ==> 7 : 1 = 14 : 2
3 yrs hence ==> 7 : 5 = 42 : 30
difference = 28 = 6 yrs
14 = x
apply cross multiplication,
x = 3 == A
14 = 3
2 = X
Apply cross multiplication,
x = 0.42== B
3 yrs ago = A : B = 3 : 0.42
7 YRS from now = 3+3+7 : 0.42+3+7
= 13 : 10.42
diff. = 2.58
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