Answer:
4:25
Step-by-step explanation:
Given that,
r₁ = 15 inches, r₂ = 6 inches
The area of the cylinder is given by :

The ratio of surface areas of two cylinders,

Hence, the required ratio is 4:25.
Answer:
1/5
Step-by-step explanation:
.2
This means 2/10
Divide the top and the bottom by 2
1/ 5