Question

In a building there are 28 cylindrical pillars with each having a radius 32 cm and height 8 m. Find the cost of painting the curved surface area of all pillars at the rate of Rs. 12 per meter square
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Answer 1

Answer:

answer is Rd.13.52

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

⇒ Total cost Rs. 8×1.69=Rs.13.52