A driver makes an emergency stop and inadvertently locks up the brakes of the car, which...

A driver makes an emergency stop and inadvertently locks up the brakes of the car, which skids to a stop on dry concrete. Consider the effect of rain on this scenario. If the coefficients of kinetic friction for rubber on dry and wet concrete are 0.80 and 0.50, how much farther would the car skid (expressed in percentage of the dry-weather skid) if the concrete were instead wet?