Answers

2015-03-15T15:21:22+05:30
Inner surface of the well =πrh
d=3.5m,h=10m.
then, inner surface of the well =2*π*3.5/2*10
=110m²
1m²=Rs45
110m²=110*45
=Rs4950.
Hope this will help you.
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the base of the well needs water, and how can you plaster it also?????????
oh yeah :)
good avishek
:)
:)
2015-03-15T15:25:52+05:30
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

Hope that helps !!
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