Answer:
r= -189
Step-by-step explanation:
Answer:
Is there any more letters
Step-by-step explanation:
Answer:
2:1.
Step-by-step explanation:
The area of a red curved surface = 2πr^2.
The area of the yellow flat surface = πr^2.
This is the case for all the hemispheres.
Therefore the required ratio = 2πr^2 : πr^2
= 2:1.
Answer:

Step-by-step explanation:
(square prism)
(cylinder)
(
cylinder)
Step-by-step explanation:
it is proved in above figure