Q. 54.1( 249 Votes )

# It costs Rs 2200

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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