Answer :

(i) Rs 20 is the cost of painting 1 m2 area Rs 2200 is the cost of painting = ( × 2200) m2

= 110 m2


Therefore, the inner surface area of the vessel is 110 m2


(ii) Let the radius of the base of the vessel be r


Height (h) = 10 m


Surface Area = 2πrh = 110 m2


= 2 ×  × r × 10 = 110


= r = m


r = 1.75 m


(iii) Volume = πr2h


= × 1.75 × 1.75 × 10


= 96.25 m3


The capacity of the vessel is 96.25 m3 or 96250 litres

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