Question

The Diameter of a well is 2.1m and 14m deep. Find the cost of plastering it at ₹5 per sq. m.​

Answer 1

Answer:

Hi ,

Let d , and h are diameter and depth of the

well ,

d = 2.1 m

radius of the well = r = d/2

r = 2.1/2 m

h = 14m

plastering area of the well = curved surface

area of the cylinder

= 2πrh

cost of plastering 1 sq m = Rs5

cost of plastering the well = 5 × 2πrh

= 5 × 2 × ( 22/7 ) × ( 2.1 /2 ) × 14

= Rs 462

I hope this helps you.

:)

Answer 2

Refer to the attachment.

hope it helps ✅✅✅

#MichAditi✨✌️