Re: It takes Mike 1 hour and 30 minutes to commute from home to work at an average speed of 40 miles per hour. If Mike r

$$Average=\frac{dis\tan ce}{time\ taken}$$ Distance between Mike's home and workplace=> $$=40\ miles\ per\ hour\ \cdot\ 1\frac{1}{2}=40\cdot1.5=60\ miles$$ Mike returns home along the same route at an average speed of 45 miles per hour. $$Time\ taken\ for\ return\ trip=\frac{dis\tan ce}{speed}=\fra...