Question

In the building there are 50 cylindrical pillars the radius of the each pillar is 4.2m and height is 7m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per m^2

pls help

Answer 1

Step-by-step explanation:

∵r=28cm=0.28mh=4m

curved surface area of a cylindrical pillars is given as;

CSA=2πrh

=2.722.0.28.4

=7.04m2

cost of painting the CSA of each pillar=8×7.04=Rs56.32

therefore total cost of painting 48 pillars=48×56.32=Rs2703.36

please refer

Answer 2

Answer:

=28cm=0.28m

h=4m

curved surface area of a cylindrical pillars is given as;

CSA=2πrh

=2.

7

22

.0.28.4

=7.04m

2

cost of painting the CSA of each pillar=8×7.04=Rs56.32

therefore total cost of painting 48 pillars=48×56.32=Rs2703.36