the ratio of the age of a and b is 9:4 three years ago the ratio of their age was 3:1 find the present ages
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Let the ratio of their ages be x
a = 9x
b = 4x
Three years ago
a = 9x - 3
b = 4x - 3
9x - 3/4x - 3 = 3/1
Cross mutiply
9x - 3 = 12x - 9
3x = 6
x = 2
a = 9x = 9*2 = 18years
b = 4x = 4*2 = 8years
a = 9x
b = 4x
Three years ago
a = 9x - 3
b = 4x - 3
9x - 3/4x - 3 = 3/1
Cross mutiply
9x - 3 = 12x - 9
3x = 6
x = 2
a = 9x = 9*2 = 18years
b = 4x = 4*2 = 8years
Jagroopvirk:
thanks
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