Bunuel wrote:
Mr. Jones drove from Town A to Town B in x hours. On the return trip over the same route, his average speed was twice as fast. Which of the following expresses the total number of driving hours for the round trip?
(A) (2/3)x
(B) (3/2)x
(C) (5/3)x
(D) 2x
(E) 3x
Let the distance between town A and B is 100 km
Let average speed from A to B SpeedAB = 50 km/h
Time taken for Jones to drive from town A to B , x = 100/50 = 2 hours
On the return trip from B to A over the same route , his average spped = 100km/h
Time taken for Jones to drive from town B to A = 100/100 = 1 hour
Total time taken = 3 hours
Now testing using answer options
(A) (2/3)x = 2/3 * 2 = 4/3 Not equal to 3
(B) (3/2)x = (3/2)*2 = 3 Correct
(C) (5/3)x = 10/3 - Not equal to 3
(D) 2x = 4 - Not equal to 3
(E) 3x = 6 -Not equal to 3
Answer B
_________________
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful