Question

A hemispherical bowl made of brass has inner diameter 10.5dm. Find the cost of tin plating it on the side at the rate of Rs.16 per 100 square cm.
Please see to it that the diameter is in dm.

Answer 1

Answer:

Rs. 2772

Step-by-step explanation:

diameter = 10.5 dm = 105 cm

radius = 105/2

Area of tin plating = 2Πr² = 2× (22/7)×(105/2)² = 17325 cm²

Cost of plating 100 cm² = Rs. 16

Cost of plating 1cm² = 16/100 = Rs. 0.16

Cost of plating 17325cm ² = 17325 × 0.16 = Rs. 2772

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