Question

find the cost of painting 20 cylindrical pillars of an institution at the rate of ₹3 per metre square ,if the radius and the length and the height of each pillar are 36 cm and 3.5 m respectively.​

Answer 1

Step-by-step explanation:

find the area of pillar then multiply the area with tge cost which result in the cost of painting one pillar and then multiply the cost of painting one pillar to 20 the will be infront of you

Answer 2

Answer:

474.60

Step-by-step explanation:

Given length or height of pillar =3.5m

Radius of each pillar =36cm

CSA of pillar =2πrh=2π×0.36×3.5

CSA=7.91m  

2

 

Now total area to be painted =7.91×20

Total Area =158.20m  

2

 

Cost of painting =158.20×3=474.60.