17 A tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. However, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. What was the planned speed of the tourist, in km/h?
Amount of time=2.5 hours Amount of time after speed increase=2 hours Let x=the initial speed Let t=the amount of hours Let y=the new speed Let z=distance
