Megan started biking to the internet cafe traveling 9 mph, after some time the bike got a flat so Megan walked the rest of the w
ay, traveling 7 mph. If the total trip to the internet cafe took 9 hours and it was 75 miles away, how long did Megan travel at each speed
2 answers:
Answer: d=54 miles
Step-by-step explanation:
We let the distance megan covered =d
And the distance she walked to the cafe will be :
75 - d
Therefore
d/9 + (75 - d) / 7 =9
L.c.m is 63
7d+9(75-d)=63×9
7d+675-9d=567
-2d=567-675
d=108/2
d=54
d=54 miles
Answer:
Megan travelled at 9mph for 6 hours and 7mph for 3 hours
Step-by-step explanation:
Speed = distance / time
Speed*time = distance
Assuming that Megan travelled x hours at 9mph
(9*x) + (7*(9-x)) = 75
x = 6 hours
So Megan travelled at 9mph for 6 hours and 7mph for 3 hours
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