A block of mass, 25.7 kg, starts at rest at the top of a frictionless ramp that makes an angle of 45.6 ^\circ ∘ below the horizontal. After it slides without friction down the entire length of the ramp, it begins to slide horizontally along a rough concrete surface with a coefficient of kinetic friction of \mu_kμ k = 0.545 until it slows to a complete stop. The initial height of the block at the top of the ramp is 1.79 meters. How far does the block slide horizontally along the concrete before it stops? [Note : this question may contain more information than is necessary to solve the problem.]