Question 24103
Let the number of hours be x


She goes at 10mi/h
Gets a ride at 25mi/h


1.5 hour longer =1.5+x


Expression: {{{25/1.5+x=10/x}}}
10(x+1.5)=25x
10x+15=25x
15x=15
x=1


1+1.5 = 2.5


Hence, it took her 2.5h to travel to her firends house and 1h to return.
Paul.