Question

In a building there are 24 cylindrical pillars. The radius of each pillar
is 28 cm and height is 4 m. Find the total cost of painting the curved surface area of
all pillars at the rate of 78 per m².​

Answer 1

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

⇒ Total cost Rs. 8×1.69=Rs.13.52

Answer 2

❥ᴀ᭄ɴsᴡᴇʀ

find attachment..☑️☑️

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