Jasmine finished the bike trail in 2.5 hours at an average rate of 9 3/10 miles per hour. Lucy biked the same trail at a rate of 6 1/5 miles per hour. How long did it take Lucy to bike the trail?

Plz explain your awnser

Answer :

Answer:

3.75 hours

Step-by-step explanation:

Using the relation

Distance = speed × time

Change Jasmine's speed into an improper fraction

9 [tex]\frac{3}{10}[/tex] = [tex]\frac{93}{10}[/tex], then

distance = [tex]\frac{93}{10}[/tex] × [tex]\frac{5}{2}[/tex] = [tex]\frac{93}{4}[/tex] miles

To calculate Lucy's time over the same distance use

Time = [tex]\frac{distance}{speed}[/tex]

Change speed to an improper fraction

6 [tex]\frac{1}{5}[/tex] = [tex]\frac{31}{5}[/tex], hence

time = [tex]\frac{\frac{93}{4} }{\frac{31}{5} }[/tex]

       = [tex]\frac{93}{4}[/tex] × [tex]\frac{5}{31}[/tex] ( cancel 93 and 31 )

      = [tex]\frac{3(5)}{4}[/tex]

      = [tex]\frac{15}{4}[/tex] = 3.75 hours

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