Question

2. If the diameter of a cylinder
is 28 cm and its height is 20 cm,
then its curved surface area is​

Answer 1

Answer:

Total surface area of a cylinder of Radius "R" and height "h" =2πR(R+h)

Radius of the base of the cylinder =28/2=14cm

Hence, total surface area of the cylinder =2x22/7x14(14+20)

=2992cm^2

Answer 2

Answer:

d=28cm, r=28/2 =14cm

height=20cm

C.S.A of cylinder =2πrh

=3×22/7×14×20

=2640cm^2

..... hope it helps you

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