Question

Find the cost of polishing a circular table top of diameter 5.6 m, if the rate of polishing is Rs.200 per metre square.
(π = 22/7)​

Answer 1

Answer:

Given diameter of table (circular) =1.6m

radius =0.8m

area of circle = πr^2

=3.14×0.64=2.0096m^2

Now rate of polishing per meter square =15Rs

Cost of polishing table top = 15×2.0096

cost = 30.14m^2

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Answer 2

Answer:

To calculate the cost of polishing of circular table, we have to calculate its area first of all.

Here, Given diameter of the circular table-top = 1.6 m.

Hence, r = 0.8 m

Area = π r2

= 3.14 × 0.8 × 0.8 = 2.0096 sq m

Cost of polishing = Rate × Area

= Rs 15 × 2.0096 = Rs 30.144

Step-by-step explanation:

Hope it helps!