Here's the given problem: One runner took 3 min 45 sec to complete a race and another runner required 4 min to run the same race. The rate of the faster runner is 0.4 m/sec more than the rate of the slower runner. Find their rates. EDIT: Show Solution.
x=first runner time y=second runner time lets skip the solution x 's rate is : 49 mp/h y 's rate is : 46 mp/h im confident ....dont crush my dreams
no-one can run at 40+ mph, thats the speed of a lion/tiger. showing working is critical. You need to work out the distance they ran in order to calculate their speeds.
Is it just me, or is this a comparative dervivation problem? I spent 5 minutes on it and filled two post-it notes. I'll need the distance.
You need to use a system of equations. Say x is the distance of the track. y = runner 1 speed z = runner 2 speed Turn all the time into seconds to be easier to work with. Runner 1 time = 225 seconds Runner 2 time = 240 seconds y = x/225 z = x/240 z = y + 0.4 y = z - 0.4 z - 0.4 = x/225 z = (x/225) - 0.4 x/240 = x/225 - 0.4 Solve for x, and you have your distance. Then with the distance and time, just find the speeds of the two runners.
wow it realy doesent mater how fast they went they also could have just gone 1 and the other 0.8 shees its not a ball buster...
