A women travels from X to Y distance of 1000 miles in 10 hours. she returns to X in 4 hours. Find her average speed	Options:  A) 300mph  B) 150.2mph  C) 142.8mph  D) 200mph  E) 111.01mph
Speed from X to Y = 1000/10= 
<gadget id="calculator">1000/10</gadget>
<output>100</output>
100 mph   Speed from Y to X= 1000/4= 
<gadget id="calculator">1000/4</gadget>
<output>250</output>
250 mph   Average speed= 2*100*250 / 350 = 142.8mph   Answer is 142.8mph
<result>C</result>
A women travels from X to Y distance of 1000 miles in 10 hours. she returns to X in 4 hours. Find her average speed