How large would a radio telescope have to be in order to image an object in the radio spectrum with a resolution of 2.8 * 10^-7 radians assuming the wavelength of the waves are 10 cm?

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The Answer of How large would a radio telescope have to be in order to image an object in the radio spectrum with a resolution of 2.8 * 10^-7 radians assuming the wavelength of the waves are 10 cm?

How Large Would a Radio Telescope Have to Be in Order