Question

pls answer me friends
soon!!! pls​

Answer 1

Step-by-step explanation:

Given:-

Length of hollow cylinder=12 cm.

External diameter=10cm.

External radius(r)=5cm.

Thickness of cylinder=2cm.

Internal diameter=8cm.

Internal radius(R)=4cm.

find the total surface area of hollow cylinder.

Solution:-

Total surface area of hollow cylinder

=2*pie*l*(R-r)+pie*(R^2-r^2)

=2*22/7*12*(5-4)+22/7*(25-16)

=75.4+28.2

=103.6 cm^2

Hope it will help you.