Question

find the cost of polishing Circular table top of diameter 1.6m, if the rate of polishing is, ₹15/m​

Answer 1

Answer:

Step-by-step explanation:

Diameter of the circular table top = 1.6 m

Radius of the circular table top =1.6/2 =0.8

Area of circular table top = π r 2 = 3.14 x 0.8 x 0.8 = 2.0096 m^2

Now cost of 1 m^2 polishing = Rs 15

Then cost of 2.0096 m^2 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

Step-by-step explanation:

diameter = 1.6m

Therefore radius = 0.8 m ( as radius is 1/2 of diameter)

area of a circle = πr^2

= 3.14 * 0.8 * 0.8

= 3.14 * 0.64

cost of polishing the circular top

= area of the top * cost of polishing per meter

= 3.14 * 0.64 * 15

= 30.144 ₹