The suspect had a head start in his escape. He was 100 metres away from the scene of the crime when the police (who were at the scene of the crime) began the chase. The suspect started running at 5 metres per second. This means that he travelled 5 metres every second. If D is the distance the suspect is from the scene of the crime and T is the time in seconds since he started running,how long will it be before the police catch the suspect?