Question

Find the cost of polishing
circular table-top of diameter 2:6m, if the rate
of polishing is a 15/m2. [ Take π = 3.14)​

Answer 1

Answer:

Given diameter of table (circular) =1.6m

radius =0.8m

area of circle = πr² = 3.14 × 0.64 = 2.0096m²

Now rate of polishing per meter square =15Rs

Cost of polishing table top = 15 × 2.0096

cost = 30.14m²

Answer 2

Answer:

Diameter = 1.6 m

∴ Radius = 1.62 = 0.8 m

Area of the table-top = πr square

= 3.14 × 0.8 × 0.8 m square

= 2.0096 m square

∴ Cost of polishing = ₹ 15 × 2.0096

= ₹ 30.14 (approx.)

Step-by-step explanation:

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