Problema Solution
A "bullet" train set a new world record for train speed at 548 kilometers per hour during a manned test run on the Test Line in April 1999. The Test Line is 42.7 kilometers long. How many minutes would a test run on the Test Line last at this record-setting speed?
Answer provided by our tutors
v = 548 km/h
d = 42.7 km
t = the time of the test run in hours
Since the speed v = d/t follows t = d/v:
t = 42.7/548 hr
Since we need to find the time in minutes and 1 hr = 60 min we multiply the time by 60:
t = 60*(42.7/548) min
t = 4.68 min approximately
The test run will last approximately 4.68 minutes.