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The internal and external diameters of a hollow hemispherical vessel are 24cm and 25cm respectively. The cost to paint 1 sq. cm of surface is Rs. 1.75.

Find the total cost to the nearest rupee to paint the vessel all over. Ignore the area of the edge. (Take ᴫ= 3.14)


Area =3.14×612.75=1924.035=1924.04 ,, cost=1924.04×1.75= Rs.3367.07 
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