Question

Find the coast of polishing a circular table-top of diameter 1.6, if rate of polishing is Rs.15/m square (take π=3.14)​

Answer 1

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The cost of polishing the circular table top is ₹ 30.144.

Step Wise Explanation

Diameter of Circular table top = 1.6m.

Radius = Diameter/2 = 1.6/2 = 0.8m

Area of Circular table top = πr²

Area of Circular table top = 3.14 × (0.8)²

Area of Circular table top = 2.0096m²

Cost of polishing 1m² of tabletop = ₹15

Cost of polishing 2.0096m² of table top = 15 × 2.0096 = ₹ 30.144 .

The cost of polishing 2.0096 m² of such table top is ₹ 30.144.

Answer 2

Answer:

Step-by-step explanation:

Solution:

Diameter of the circular tabletop = 1.6 m

Radius of the circular tabletop = 1.6 m / 2 = 0.8 m

Area of circular tabletop = πr 2

= 3.14 × 0.8 m × 0.8 m

= 2.0096 m2

Since, the cost of 1m2 polishing = ₹ 15

The cost of polishing 2.0096 m2 = ₹ 15 × 2.0096

= ₹ 30.144

Thus, the cost of polishing a circular tabletop is ₹ 30.144.