The ratio of the ages of Maala and Kala is 3 : 5. The total of their ages is 3.2 decades. The proportion of their ages after 0.8 decades will be
[1 Decade = 10 years] Choose the correct choice
A) 6:5
B) 5:7
C) 4:5
D) 7:9
E) 3:6
Let, Maala’s age = 3A and Kala’s age = 5A   Then 3A + 5A = 32   A = 4   Maala’s age = 12 years   and Kala’s age = 20 years   Proportion of their ages after 8 is = (12 + 8) : (20 + 8)   = 20 : 28   = 5 : 7   Answer : 5:7
<result>B</result>
The ratio of the ages of Maala and Kala is 3 : 5. The total of their ages is 3.2 decades. The proportion of their ages after 0.8 decades will be
[1 Decade = 10 years]