What must be the mimimum Diameter of a telescope be in order to resolve two Binary stars seperated by 0.06 arc

Question

What must be the mimimum Diameter of a telescope be in order to resolve two Binary stars seperated by 0.06 arc seconds? Assume that you are observing in the visible portion of the spectrum and you don't need to worry about the effects of the Earth's atmosphere.

Which:
2.0 cm

2.0 meters

20 meters

200 meters

impossible to say..it depends on the distance to the two stars

Answer 1

2 meters. Dawes limit says that 4.56/D=arc seconds, where D is inches. Plugging in 0.06 for the arc seconds gives 76 inches, which is 2 meters.