A hemispheric bowl made of brass has inner diameter 10.5 cm. Find the cost of tin- plating it on the inside at the rate of rupees 32 per 100 cm square
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The picture shows the way to calculate the are of the inner surface.
So,
Area of inner surface = 173.25 square cm
Cost of tin plating 100 square cm = ₹35
So, cost of tin plating 1 square cm = ₹0.35
So total cost of tin plating inner surface = 173.25 × 0.35 = ₹86.625
This amount can be approximated to ₹86.63
So,
Area of inner surface = 173.25 square cm
Cost of tin plating 100 square cm = ₹35
So, cost of tin plating 1 square cm = ₹0.35
So total cost of tin plating inner surface = 173.25 × 0.35 = ₹86.625
This amount can be approximated to ₹86.63
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