15/4 simplifies to 3 1/2 and 17/5 simplifies to 3 2/5 so 15/4 is greater
209 is the answer (if you know how to divide do it)
The place value of the 5 is 10 times the place value of the 9 in 159.20. The 9 is in the units position.
39/1.5=26 for the 1.5 hours difference.
divide 26/2=13 for each person.
divide 4/2 for the speed increase of person north. The speeds much average to 13.
subtract 13-2=11 and add 13+2=15 for south and north.
north speed is 15 km per hour and south is 11 km per hour.
