David walks to a viewpoint and returns to the starting point by his car and thus takes a total time of 2 hours . He would have gained 1 hour by driving both ways. How long would it have taken for him to walk both ways.
Pick:  A) 3 h  B) 3 h 15 min  C) 4 h  D) 5 h  E) 6 h
1.Walking to to a viewpoint+Driving back=2 hours   2.Driving to a viewpoint+Driving back=2 hours - 1 hour=1 hour,   thereforeone way driving=1 hour/2 = 30 minutes.   3. From 1.one way driving=2 hours-30 minutes=1 hour 30 minutes.   4.Walking to to a viewpoint+Walking back=1 hours 30 minutes+1 hours 30 minutes=3 hours   3 hnswer: 3 h
<result>A</result>
David walks to a viewpoint and returns to the starting point by his car and thus takes a total time of 2 hours . He would have gained 1 hour by driving both ways. How long would it have taken for him to walk both ways.