Question

The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm

respectively. If the cost of painting 1 cm2 of the surface area is Rs.0.05, find the total cost

of painting the vessel all over.​

Answer 1

Answer:

inner radius ( r ) = 12 cm

external radius ( R )  = 12.5 cm

total surface area to be painted =  π ( 2R² + 2 r² + R² - r² )

                                                           π ( 3R² + r² )

                                                         =  1925.78 cm²

Total cost of painting  =  1925.78 * 5  /  100

= Rs 96.28

PLEASE MARK BRAINLIEST

Step-by-step explanation: