Sat difficult question!!

Graham walked to school at an average speed of 3 miles an hour and jogged back along the same route at 5 miles an hour. If his total traveling time was 1 hour, what was the total number of miles in the round trip?
a) 3
b) 3 and 1/8
c) 3 and...

3/4
d)4
e) 5
please help me with the answer and explanation (show me how to answer it!!!)
SAT IS IN LESS THAN A MONTH!!! XD

The total time for one way is 3 you divide that by half. The other half of the way he did half of 5. Add 1 1/2 (half of 3 miles per hour) plus 2 1/2 (half of the 5 miles per hour). Equals 4 miles

Thanks!!

Wrong. It's,
distance = rate * time (d = rt)

total time (1 hour) = t1 + t2

t1 = time spent walking to school
t2 = time spent jogging home from school

t1 = d1/r1, r1 = 3 mph
t2 = d2/r2, r2 = 5 mph

t1 + t2 = d1/3 + d2/5 = 1 hour
d1 = d2 (The same route was traveled, so both distances are equal. d = length (or distance) of route)

(1/3 + 1/5)d = 8/15d = 1 hour

d = 15/8 = length of route one way
2d = 30/8 = total miles traveled in round trip = 3.75 miles

distance = rate * time (d = rt)

total time (1 hour) = t1 + t2

t1 = time spent walking to school
t2 = time spent jogging home from school

t1 = d1/r1, r1 = 3 mph
t2 = d2/r2, r2 = 5 mph

t1 + t2 = d1/3 + d2/5 = 1 hour
d1 = d2 (The same route was traveled, so both distances are equal. d = length (or distance) of route)

(1/3 + 1/5)d = 8/15d = 1 hour

d = 15/8 = length of route one way
2d = 30/8 = total miles traveled in round trip = 3.75 miles

thx for the answer but a little late XD no worries I didnt get anything similar!