Period of a binary star system

1. A.
   $2\pi\sqrt{\frac{d^{3}}{3Gm}}$
2. B.
   $\frac{1}{2\pi}\sqrt{\frac{3Gm}{d^{3}}}$
3. C.
   $\frac{1}{2\pi}\sqrt{\frac{d^{3}}{3Gm}}$
4. D.
   $2\pi\sqrt{\frac{3Gm}{d^{3}}}$

Tap an option to check your answer.

1. A.
   $2\pi\sqrt{\frac{\left( r_{1} + r_{2} \right)^{3}}{G\left( m_{1} + m_{2} \right)}}$
2. B.
   $2\pi\sqrt{\frac{\left( r_{1} + r_{2} \right)r_{2}^{2}}{G\left( m_{1} + m_{2} \right)}}$
3. C.
   $\frac{2\pi\left( r_{1} + r_{2} \right)^{\frac{3}{2}}}{\sqrt{G\left( m_{1} + m_{2} \right)}}$
4. D.
   $\frac{2\pi\left( r_{1} + r_{2} \right)^{2}r_{1}}{G\left( m_{1} + m_{2} \right)}$

Tap an option to check your answer.