Answer:
4 hours
Step-by-step explanation:
Distance covered = 30 km
Usual Speed of both = 10km/hr
Justin's speed = 1/2 * 10 = 5km/hr
Ari's speed = 3/2 * 10 = 15 km/hr
Time taken = distance / speed
Justin's time = 30 / 5 = 6 hours
Ari's time = 30 / 15 = 2 hours
Time difference = (6 - 2) = 4 hours
Whole numbers are positive numbers without decimals. First, list all the whole number factors of 36:
1 and 36
2 and 18
3 and 12
4 and 9
6 and 6
Next, see which one of those pairs has the highest sum:
1+36=37
2+18=20
3+12=15
4+9=13
6+6=12
The greatest possible sum the numbers can have is 37.
Hope this helps!!