Abus on a regular schedule takes 3 1/4 hours to reach its destination. the express bus takes 2 1/2 hours to make the same trip. how much travel time can be saved by taking the express?
a. 5 3/4 hours
b. 2 hours
c. 3/4 hour
d. 1 1/4 hours

Time taken by a regular bus to reach its destination = 3 1/4 hours
                                                                                   = 13/4 hours
Time taken by the express bus to make the same trip = 2 1/2 hours
                                                                                       = 5/2 hours
Time that can be saved by taking the express bus = (13/4) - (5/2) hours
                                                                                 = (13 - 10)/4 hours
                                                                                 = 3/4 hours
So 3/4 hours can be saved by taking the express bus rather than the regular bus. The correct option among all the options given in the question is option "C". I hope the procedure is simple enough for you to understand.

The answer is 109 times per second