David walks to a viewpoint and returns to the starting point by his car and thus takes a total time ...
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.
Answer/Solution
3 h
Steps/Work
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
Answer: A
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
Answer: A