Answer:
2.5 yr
Step-by-step explanation:
Current age of MR.Rao = 50 yr
Current age of Sowjanya = 20 yr
Let assume that, after x year , age of Mr. Rao will be 3 time her daughter
so,
50+ x = 3(20 + x)
50 + X = 60 + 3x
X = 10/4 = 2.5 yr
Step-by-step explanation:
hope it helps