Two trains left a station at the same time. one traveled north at a certain speed and the other traveled south at twice that speed. after 4 hours, the trains were 600 miles apart. how fast was each train traveling?

Speed of northbound train is 50 mph and speed of southbound train is 100 mph

Solution:

Let "s" be the speed of northbound train

Given that the other traveled south at twice that speed

Then, 2s is the speed of south bound train

After 4 hours, the trains were 600 miles apart

Since the train has left station at same time,

Distance = 600 miles

Time taken = 4 hours

Distance is given by formula:

Therefore,

Thus speed of northbound train is 50 mph

Speed of southbound train = 2s = 2(50) = 100 mph

Thus speed of southbound train is 100 mph

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.