This question is quite complex. A detailed analysis would require data concerning i.one's weapon (
e.g. specific impulse of the propellant, drag coefficients, aerodynamics, details of the ogive of the payload, etc.), ii.the environment (
e.g. temperature, pressure, wind-speed, etc.), and iii.the target (
e.g. elevation, terrain, forestation, etc.). And if DonDiego [B.S.A.E, M.S.I.E., RS(ret)] could obtain this information, it would takes some time-consuming calculations on his slide rule to arrive at a precise answer, . . . if he could even find his slide rule.
Nonetheless, relying on personal experience over his lifetime DonDiego estimates that given sufficient thrust of his missile he could likely deliver his payload into Pyongyang [
sp?] in approximately 70 seconds. And if the target were well-elevated and forest-free, DonDiego would likely complete his mission in well under 70 seconds.

_______DPRK No-Dong Missile and locations__________