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The ratio of madhus age and karinas age is 6:7.after 12years the ratio of their ages will be 12:13. Find their present ages?
asked by
navjot

6/7 = m/k so m = 6 k/7
12/13 = (m+12)/(k+12)
or
12/13 = (6k/7 + 12) / (k+12)
12/13 = (6 k + 84)/7(k+12)
84 (k+12) = 13 (6 k + 84)
84 k + 1008 = 78 k + 1092
6 k = 84
k = 14
then m = 6 k/7 = 12posted by Damon

let their ages be 6x and 7x
(6x+12)/(7x+12) = 12/13
78x + 156 = 84x + 144
6x = 12
x = 2
they are now 12 and 14posted by Reiny
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