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Not sure if you will understand my working.. I tried to write it in detailed . XD
Date Posted:
3 years ago
The hallow surface area is just half the curve surface area of a cylinder with a height of 28cm and a base circle with radius of 3cm... so it’s just 0.5(28cm x π(6cm)) -> 0.5(height x π(diameter))
Yes. I understand now. Thks
Np ! !