Question

(ii) If the inner curved surface of the well in part (i) above is to be plastered at the rate
of 50 per m2, find the cost of plastering,.​

Answer 1

Answer:

Step-by-step explanation:

We know that a well is in a shape of a cylinder. So to find the cost of plastering, we need to find the curved surface area of the walls first and then multiply it to the cost.

So CSA of cylinder = 2πrh  

= 22/7 x 3.5/2 x 10

= (22 x 0.5 X 10)/2

= 110 m²

Now cost = 110 x 45  

= Rs 4950