The external and internal diameters of a hollow hemispherical vessel are 12cm and 10cm respectively. The cost of painting is Rs. 2 per sq. cm. Find the cost of painting the vessel all over.
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Answer:
₹ 6176
Step-by-step explanation:
external diameter - 12cm
interior diameter- 10cm
exterior radius- 12/2=6cm
interior radius- 10/2= 5cm
volume of hemisphere= 2/3π(r)cube
= 2/ 3× 22/7×6×6×6
= 3088cm
cost for painting the vessel= ₹2
= 3088× 2
= ₹6176
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