Question

2. For a hollow cylinder of external
radius Rcm, internal radius r сm and
height = h cm, thickness of the
cylinder in cm is:​

Answer 1

Answer:

Step-by-step explanation:

Outer radius=R

Inner radius=r

height=h

Now,

Thickness=Area of the big circle-Area of the small circle

Thickness=πR² - πr²

Thickness=π(R²- r²)

Therefore Thickness=π(R²- r²)