Jack and Jill are marathon runners. Jack can finish a marathon (41 km) in 4.5 hours and Jill can run a marathon in 4.1 hours.What is the ratio of their average running speed? (Jack: Jill)	Select the correct option:
A) 41/45	B) 15/14	C) 4/5	D) 5/4	E) Cannot be determined
41/45verage Speed of Jack =Distance/ Time   = 41 /(9/2) = 82/9   41/45verage Speed of Jill = 41/(4.1)= 
<gadget id="calculator">41/(4.1)</gadget>
<output>10</output>
10   Ratio of 41/45verage speed of Jack to Jill= (82/9)/10 = 82/90 = 41/45   41/45nswer 41/45
<result>A</result>
Jack and Jill are marathon runners. Jack can finish a marathon (41 km) in 4.5 hours and Jill can run a marathon in 4.1 hours.What is the ratio of their average running speed? (Jack: Jill)