Question

4. In your school there are 12 cylindrical pillars. The radius of
pillar is 28 cm and height is 4 m.
i) Find the total surface area of all pillars?​

Answer 1

Answer:

It will Be 35 x 35 this is the answer

Answer 2

Step-by-step explanation:

C.S.A. of cylindrical =2πrh

⇒ C.S.A. of are pillar =2×

7

22

×28×4=704cm

2

⇒ C.S.A. of 24 pillars =24×704=16896cm

2

=16896×10

−4

m

2

=1.69m

2