To find the answer to this question, we first need to know how many miles the family has gone. We can do this using the formula D = R * T
D = 45 * 2 D = 90
Now we know how many miles the family is in front of the neighbor before he starts driving. Now we need to find how much faster the speed of the neighbor is compared to the family.
60 - 45 = 15, so the neighbor goes 15 mph faster. To find how long it will take for the neighbor to overtake the family, we need to calculate the time it will take for the neighbor to catch up 90 miles. We can do this by dividing 90 by 15 (because that's how much faster the neighbor is).
90/15 is 6, so it will take the neighbor 6 hours to overtake the family.
Step-by-step explanation: it takes him 2 hours to fill 1800 another 2 hours would be 12pm if you have 1000+1000 you get 2000. then add 800 and 800. you get 1600 add them all together you get 3600.