Your question is a little like asking how high is up? The basic approach speed for any transport category aircraft (and most other aircraft as well) is 1.3 times the stall speed in the approach configuration - gear down and landing flaps. To answer your question you really have to state a weight. For example, the two aircraft that I fly have ref speeds from 115 knots to 130 knots and 120 knots to 140 knots depending upon aircraft weight. On top of this, many pilots like to fly the aircraft a little faster than ref on final, say by 5 to 10 knots dependidng upon the weather and wind conditions.