Estimate the maximum downwind distance a flammable propane cloud could go from the instantaneous release of propane from your backyard grill. Assume the propane bottle is full (20 lbm), and the violent tank rupture instantaneously forms a cloud with 3 lbm air mixed in per lbm propane (for this amount of mixing, the resulting cloud is very close to ambient temperature). This cloud disperses downwind. If the cloud is flammable to a propane concentration of 1% (mole percent), what is the maximum extent of the flammable zone? What wind speed would give this result?