speed = distance/timespeed =18km/h and time =8hSubsituting speed and time in the speed equation above,⇒18km/h=8hdistanceMake distance the subject. Since 8 h is dividing, multiply both sides by 8 h⇒8h×18km/h=8h× distance 8h,8h cancels each other leaving distance alone at the right side of the equation.⇒8×18km=distance⇒distance=144km