Answer:
45
Step-by-step explanation:
1x^2 -6=5x
1x-6=5x
-6=4x
-6/4x= -1.5
Answer: 12 cm
The masses of the spheres are proportional to their volums, and the cube of the ratio is k^3=135/5=27 ==> k=3
The greater radius is 3*4=12 (cm)