Question

Find the cost of laminating decolam to a circular table of radius 1.4m, if the rate of decolam is rupees per m²

Answer 1

Given that,

Radius of a circular table = 1.4 m

Rate of laminating decolam = 1 rupee / m^2

To find,

The cost of laminating decolam of the circular table = ?

First of all, we'll reckon the area of the circular table.

We know that,

Area of a circle = $\pi r^2$

Area of the circular table = $\pi r^2$

Area of the circular table = $\frac{22}{7} \times 1.4\:m \times 1.4\:m$

Area of the circular table = $\frac{22}{\cancel{7}} \times \cancel{1.4\:m} \times 1.4$

Area of the circular table = $22 \times 0.2\:m \times 1.4\:m$

Area of the circular table = 1.16 m^2

Now, we've gotta the area of the circular table. Now we'll multiply it with the rate so that, we'll get the total cost of laminating decolam.

Total cost of laminating decolam = area $\times$ rate

Total cost of laminating decolam = $1.16\:m^2 \times 1 rupee / m^2$

Total cost of laminating decolam = $1.16\:m^2$