The ratio of the ages of Malini and Radha is 2 : 4. The total of their ages is 2.4 decades. The proportion of their ages after 0.8 decades will be
[1 Decade = 10 years] Options.
A) 6:5  B) 3:4  C) 4:5  D) 2:3  E) 3:6
Let, Malini’s age = 2A and Radha’s age = 4A   Then 2A + 4A = 24   A = 4   Malini’s age = 8 years   and Radha’s age = 16 years   Proportion of their ages after 8 is = (8 + 8) : (16 + 8)   = 16 : 24   = 2 : 3   Answer : 2:3
<result>D</result>
The ratio of the ages of Malini and Radha is 2 : 4. The total of their ages is 2.4 decades. The proportion of their ages after 0.8 decades will be
[1 Decade = 10 years]