Question

Find the cost of polishing a circular table top of diameter 1.6m , if the rate of polishing is 15rs per m2
$take \: \pi = 3.14$
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Answer 1

Answer:

Then cost of 2.0096 m2 polishing = 15 x 2.0096 = Rs 30.14 (approx.) Thus, the cost of polishing a circular table top is Rs 30.14 (approx.)

Answer 2

Answer:

$Diameter= 1.6m \: \: \\ </p><p></p><p>Radius= \frac{1.6}{2}=0.8m^{ }21.6=0.8m \\ </p><p></p><p>Area of the table top= \pi r^2πr2 \\ </p><p></p><p>=3.14\times0.8\times0.8m^2=3.14×0.8×0.8m2 \\ </p><p></p><p>=2.0096m^2=2.0096m2 \\ </p><p></p><p>Cost \: of \: polishing = \\ Rs 15\times2.009615×2.0096 \\ </p><p></p><p>=Rs 30.14 (approx)</p><p></p><p>$