Answer:
The formula to calculate the total surface area of a cylinder is given as, the total surface area of cylinder = 2πr(h + r), while the curved surface area of cylinder formula is, curved/lateral surface area of cylinder = 2πrh, where 'r' is the radius of the base and 'h' is the height of the cylinder.
Step-by-step explanation:
hope it helps you
because I am not getting your answer
The main idea is using the Pythagorean formula to find the length of line segment 
.
Alr so you use the formula 
is already given and is 
and 
is 
So using algebraic rules you'll get 
as:
Now using the formula: 
, you can find the area of tri ABD and CBD which would be 
and 
so add them up and you get 
!
x=5
14x5= 70
70-21=49
this is how I got the answer
Answer:
B. y=0
Step-by-step explanation:
