Jack and Paul are running 1000m. Jack runs 1.5Km/hr faster than Paul but also finishes the race 1.5 sec earlier. What is the speed of Jack??  Pick:
A) 19.6  B) 20.6  C) 21.6  D) 22.6  E) 23.6
distance(given) 1000m   paul speed(let)= x m/s   time(paul take)= 1000/x sec   jack speed= x + 1.5*(5/18) m/s   tym (jack)= 1000/(x+7.5/18) s   tym(paul) - tym (jack) = 1.5   solving for x we get 20.20   speed of jack is 20.20+ 7.5/18=20.61   ANSWER:20.6
<result>B</result>
Jack and Paul are running 1000m. Jack runs 1.5Km/hr faster than Paul but also finishes the race 1.5 sec earlier. What is the speed of Jack??