Answers

  • Brainly User
2014-06-04T13:03:08+05:30
Volume of soil to be taken out
= \pi r^{2} h
= \frac{22}{7}* 1^{2} *20
 =62.85 cubic m.   
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2014-06-04T16:07:52+05:30
Volume of soil = volume of well
                     = pi*r²*h
                     = (22/7)1²*20
                      = 62.857 m³.
curved surface area of well = 2*pi*r*h
                                       = 2(22/7)*1*20
                                      = 125.714 m².
cost of plastering = 50*125.714 =  Rs. 6285.7 
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