Question

In a building there are 16 cylindrical pillars. The radius of each pillar is 25 cm and height is 3.5 m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs.12.50 per m^2​

Answer 1

Answer:

68.75

Step-by-step explanation:

Given:

H=3.5 m, R=  

2

50

​

=25 cm =  

100

25

​

=0.25 m

⇒CSA=2πrh=(2×  

7

22

​

×0.25×3.5) m  

2

 

=5.5 m  

2

 

⇒Cost of painting 1 m  

2

 area = Rs.12.50

⇒Cost of painting 5.5 m  

2

 area  

= Rs.5.5×12.50

= Rs.68.75