  We present our results of a combined analysis of radial velocity and light
curves of a double-lined spectroscopic and eclipsing binary KIC 09246715,
observed photometrically by the $Kepler$ satellite, and spectroscopically with
the OAO-1.88m telescope with the HIgh-Dispertion Echelle Spectrograph (HIDES).
The target was claimed to be composed of two red giants, one of which is
showing solar-like oscillations. We have found that the mass and radius of the
primary are $M_1=2.169\pm0.024$ M$_\odot$ and $R_1=8.47\pm0.13$ R$_\odot$, and
of the secondary: $M_2=2.143\pm0.025$ M$_\odot$ and $R_2=8.18\pm0.09$
R$_\odot$, which confirms the double-giant status. Our secondary is the star to
which the oscillations were attributed. Results of its previous asteroseismic
analysis are in agreement with ours, only significantly less precise, but the
subsequent light-curve-based study failed to derive correct mass and radius of
our primary. KIC 09246715 is one of the rare cases where asteroseismic
parameters of a solar-like oscillator were confirmed by an independent method,
and only the third example of a Galactic double-giant eclipsing binary with
masses and radii measured with precision below 2%.
