Question 121178
10=25T FOR THE FIRST HALF OF THE TRIP
10=XT FOR THE SECOND HALF OF THE TRIP
THE TOTAL TIME=20/40=.5 HOURS.
10/25+10/X=.5
.4+10/X=.5
10/X=.5-.4
10/X=.1
.1X=10
X=10/.1
X=100 MPH FOR THE SECOND HALF OF THE TRIP.
PROOF
10/25+10/100=.5
.4+.1=.5
.5=.5