Solve =P/pid^2/4=900*4/pid^2

$$= \frac { P } { \pi d ^ { 2 } / 4 } = \frac { 900 \times 4 } { \pi d ^ { 2 } }$$

Solve for P

$$P=900$$

$$d\neq 0$$

Steps for Solving Linear Equation

The equation is in standard form.

$$\frac{4}{\pi d^{2}}P=\frac{3600}{\pi d^{2}}$$

Divide both sides by 4\pi ^{-1}d^{-2}.

$$\frac{\frac{4}{\pi d^{2}}P\pi d^{2}}{4}=\frac{3600}{\pi d^{2}\times \frac{4}{\pi d^{2}}}$$

Dividing by 4\pi ^{-1}d^{-2} undoes the multiplication by 4\pi ^{-1}d^{-2}.

$$P=\frac{3600}{\pi d^{2}\times \frac{4}{\pi d^{2}}}$$

Divide \frac{3600}{\pi d^{2}} by 4\pi ^{-1}d^{-2}.

$$P=900$$

Solve for d

$$d\neq 0$$

$$P=900$$