Latha travels from A to B a distance of 1000 miles in 10 hours. He returns to A in 5 hours. Find his average speed?  Choose the correct option.
A) 100mph B) 125.98mph C) 156.15mph D) 133.3mph E) 110.5mph
Speed from A to B = 1000/10= 
<gadget id="calculator">1000/10</gadget>
<output>100</output>
100 mph   Speed from B to A= 1000/5= 
<gadget id="calculator">1000/5</gadget>
<output>200</output>
200 mph   Average speed= 2*100*200 / 300 = 133.3mph   Answer is 133.3mph
<result>D</result>
Latha travels from A to B a distance of 1000 miles in 10 hours. He returns to A in 5 hours. Find his average speed?