gnmps

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
  1. 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 = 12

    posted by Damon
  2. 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 14

    posted by Reiny

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Algebra

    The present age of raj and ram is in the ratio 1:3. After 5 yrs rams age wiil be 2yrs more than twice of rajs age . Find their present ages
  2. Math

    The present ages of a man and his wife are as 6:4. Five years ago their ages were in the ratio 5:3. What is the age gap of the couple?
  3. Maths

    The ages of jaso and janam are in the ratio 7:9 four years from now the ratio of their ages will be 4:5 find their present ages
  4. math

    The ratio between the present ages of P and Q is 3:4 respectively. If Q's present age is 20 years, what will be the ratio of the ages after 5 years?
  5. Math

    The sum of the ages of a woman and her daughter is 46years.In 4 years, the ratio of their ages will be 7:2. Find their present ages.
  6. Math

    The sum of the ages of a woman and her daughter is 46years.In 4 years, the ratio of their ages will be 7:2. Find their present ages.
  7. MATH

    Solve each questions by age equation problem: 1. Jonathan is 3 years older than Alvin. In 7 years, Alvin's age will be 6/7 of Jonathan's age. How old are they now? 2. The present age of Ella's mother is three times that of Ella.
  8. Maths - Ratio

    Angelique and Serena’s ages are in the ratio 5:3. Serena’s and Venus’ ages are in the ratio 6:5. If Angelique is 25 years older than Venus, calculate the average age of the three girls.
  9. Maxwell

    3 times the age of Felicia is four more than the age of Tom.In three years,the sum of their ages will be 30 years.Find their present ages.
  10. business

    Your budjet allows you to purchase only one math software package for your children ages 5-8. Which one of the following packages would probably be best for this age group? A. Ages 4-7 B. Ages 6-9 C. Ages 7-9 D. Ages 6 and up. Can

More Similar Questions