Question

hemispherical bowl has an inner radius 10.5 cm find the volume of milk it can hold if the bowl is made of brass find the cost of tin planting it on the inside at rupees 12 per metre per hundred CM square?

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Answer 1

Answer:

hy

Step-by-step explanation:

ere we will tin-plate the inside of the hemisphere So, We need to find the curved surface area of hemisphere

Radius of hemisphere = r = /2 = (10.5/2) cm = 5.25 cm

Curved surface area of the hemisphere = 22 = (2×22/7×5.25×5.25) cm2 = 173.25 cm2

Cost of tin-plating 100 cm2 = Rs 16

 

Cost of tin-plating 1 cm2 = Rs 1/100 × 16

 

Cost of tin-plating 173.25 cm2 = Rs 1/100 × 16 × 173.25 = Rs 27.72

 

∴ Cost of tin-plating the hemisphere is Rs 27.72

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