Solve pi*48^2a/360-(pi*12^2a/360)=630pi

$$\pi \times { 48 }^{ 2 } \frac{ a }{ 360 } -( \pi \times { 12 }^{ 2 } \frac{ a }{ 360 } ) = 630 \pi$$

Solve for a

$$a=105$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 360.

$$\pi \times 48^{2}a-\pi \times 12^{2}a=226800\pi$$

Calculate 48 to the power of 2 and get 2304.

$$\pi \times 2304a-\pi \times 12^{2}a=226800\pi$$

Calculate 12 to the power of 2 and get 144.

$$\pi \times 2304a-\pi \times 144a=226800\pi$$

Combine \pi \times 2304a and -\pi \times 144a to get 2160\pi a.

$$2160\pi a=226800\pi$$

Cancel out \pi on both sides.

$$2160a=226800$$

Divide both sides by 2160.

$$a=\frac{226800}{2160}$$

Divide 226800 by 2160 to get 105.

$$a=105$$