A binary star system consists of two equal mass stars that revolve in circular orbits about their center of mass. The period of the motion, T$=15\mathrm{.}4$T$=15\mathrm{.}4$days and the orbital speed v$=220$v$=220$km$/$s of the stars can be measured from telescopic observations. What is the mass of each star?

kg $(2$E$30$ kg$)$A binary star system consists of two equal mass stars that revolve in circular orbits about their center of mass. The period of the motion, T$=15\mathrm{.}4$T$=15\mathrm{.}4$days and the orbital speed v$=220$v$=220$km$/$s of the stars can be measured from telescopic observations. What is the mass of each star?

kg $(2$E$30$ kg$)$