Josh drives from his house to work and back. Same distance each way. On his way to work he drives @ an average of 60 mph. Oh his way back, he drives @ an average of 80 mph. What was his average speed?
(a) 60.0
(b) 68.6
(c) 70.0
(d) 71.4
(e) 80.0
Ok, so I see that he is spending "more time" at 60 mph rate and that since the distance is the same it has to be less than 70 mph but not too much less, so clearly the answer is (b). But how does one set up the math for this question?
(a) 60.0
(b) 68.6
(c) 70.0
(d) 71.4
(e) 80.0
Ok, so I see that he is spending "more time" at 60 mph rate and that since the distance is the same it has to be less than 70 mph but not too much less, so clearly the answer is (b). But how does one set up the math for this question?
