pooja travels from A to B a distance of 800 miles in 10 hours. He returns to A in 5 hours. Find his average speed?
Options
A) 123.07 mph	B) 100 mph	C) 150.07 mph	D) 200 mph	E) 300 mph

Rationale: speed from a to b = 800 / 8 = 100 mph speed from b to a = 800 / 5 = 160 mph average speed = 2 * 100 * 160 / 260 = 123.07 mph answer is a
Answer: A