Question 1189686
If I drive 60 mph and arrive 4 minutes late how fast do I have to drive to arrive on time?
:
I think you have to know what the distance that you drove in order to get a unique answer.
A simple example: you drove 60 mi in 1 hr (60 min) and arrived 4 min late
You want to drive the 60 mi in 56 min
let s = the required speed to accomplish this
{{{60/s}}} = {{{56/60}}}
cross multiply
56s = 3600
s = 3600/56
s = 64.3 mph
:
let's say the distance was 120 mi, driving time would be 120 min which is still 4 min late, so you want to do the trip in 116 min
{{{120/s}}} = {{{116/60}}}
s = 7200/116
s = 62.07 mph