the inner diameter of a circular well is 4.2 M it is 2 m deep find(I) its inner curved surface area(ii) the cost of plastering the inner curved surface at the rate of rupees 50 per metre square
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d=4.2m
h=2m
C.S.A. =2πrh
so, r= d/2=2.1m
C.S.A.=2*22/7*2.1*2
=26.4m^2
2nd) part
cost of per cm ^2=Rs.50
so,
50x26.4=Rs.
1320.0
h=2m
C.S.A. =2πrh
so, r= d/2=2.1m
C.S.A.=2*22/7*2.1*2
=26.4m^2
2nd) part
cost of per cm ^2=Rs.50
so,
50x26.4=Rs.
1320.0
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