Question

help me to solve this.

Answer 1

√a/√b. + √b/√a= 4 :1
let x = √a/√b , then √b/√a = 1/x
then
x +1 / x = 4/1
4x = x +1
3x = 1
x= 1/3

√a/√b = 1/3

so
a:b = 1/9