Question

32. In a building there are 10 cylindrical pillars. The radius of each pillar is 28cm & height 4m.
Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per
m?
Or​

Answer 1

Answer:

I don't know the answer ...

Answer 2

Answer:

Rs. 563.2

Step-by-step explanation:

GIVEN
radius = 28cm = 0.28m
height = 4m

cost of painting = RS.8 per $m^{2}$

curved surface area of pillar = 2πrh

=2×$\frac{22}{7}$×0.28×4
=7.04$m^{2}$
cost of painting the CSA of each pillar=8×7.04

                                                              =Rs56.32

therefore total cost of painting 10 pillars=10×56.32

                                                                   = Rs. 563.2