Question

the diameter of circle is 42m , a wide path is built around it 3.5m ......find the total area of circle???

Answer 1

Answer on Question#39590 – Math – Geometry

The diameter of circle is $42\mathrm{m}$, a wide path is built around it $3.5\mathrm{m}$ ...find the total area of circle???

Solution:

We can find total area of circle using the formula:

$$\text{area of circle} = \pi \cdot \mathrm{R}_{\text{total}}^2 = \pi \cdot \left(\frac{\mathrm{D}}{2} + \mathrm{h}\right)^2 = \pi \cdot \left(\frac{42\mathrm{m}}{2} + 3.5\mathrm{m}\right)^2 = 1886\mathrm{m}^2$$

Answer: total area of circle is equal to $1886\mathrm{m}^2$.