Question

the ratio of age of pinku and rinku 10 years ago was in the ratio 6:7. after 6 years pinku age would be 90.09% less than rinku age. what would be age of rinku after 9 year

Answer 1

Answer:

60

Step-by-step explanation:

Let the age of Pinku be denoted as P and that of Rinku as R

Equation 1:

(P - 10)/(R - 10) = 6 /7

Solving:

7P = 10 + 6R----(1)

Equation 2:

(P + 6) = (9.91/100)*(R+ 6)

Solving:

0.991R - P  = 5.4 ----(2)

Solving the simultaneous equations 1 and 2

we get R  = 51

after 9 years R's age would be 51+9 = 60