Question

the internal and external Radi of hollow cylinder is 12 and 18 cm respectively, height is 14cm, find the curved surface area and total surface area​

Answer 1

Answer:

7920cm3

Step-by-step explanation:

Pi*(R2-r2) h

=22/7(R+r)(R-r)h

=22/7*30*6*14=7920cm3

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