Question 703804
___________Speed------------Time---------Distance
High Speed___r_____________(___)_________60
Low Speed ___12____________(___)_________(__)
Total_______________________8____________100


Fill in the missing information to the table:
___________Speed------------Time---------Distance
High Speed___r_____________((60/r))_________60
Low Speed ___12____________(40/12)_________(40)
Total_______________________8____________100


The time sums to 8 hours:
{{{60/r+40/12=8}}}
.
{{{180+10r=24r}}}
r=90/7,
{{{r=12+6/7}}}