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As the unit of volume given in the question is too small so considering it 6160 m³
Volume of cylindrical tank = π r²×h
⇒6160= π×(14)²×h
⇒h = 10 m
now, the area of curved surface= 2π r×h =2π ×14×10 =880 m²
cost of painting that surface = Rs 3×880 = Rs 2640
Please check question carefully then answer.
Volume of cylinder=6160 , h=.00001m
Mr. Qais . sorry!!
see my consideration
that much volume with radius 14 m is practically impossible
so i'm using little bit of logic