After driving along at a certain speed for 5 hours, Rich realizes he could have covered the same distance in 3 hours if he had driven 20 mi/h faster. What is his current speed?
Let x be current speed.
Distance covered in 5 hours =5x
If he had driven 20 miles faster, speed =x+20
He would have covered in 3 hours
His current speed = 30 miles per hour
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