SOLUTION: Jermaine took a bus trip to visit his grandmother. His round trip travel time was 2 1/2 hours If the bus averaged 45 miles per hour going to his grandmother’s house and 30 miles pe
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Question 310001: Jermaine took a bus trip to visit his grandmother. His round trip travel time was 2 1/2 hours If the bus averaged 45 miles per hour going to his grandmother’s house and 30 miles per hour on the return trip, how many miles from his grandmother’s house does Jermaine live?
You can put this solution on YOUR website! His round trip travel time was 2 1/2 hours.
If the bus averaged 45 miles per hour going to his grandmother’s house and 30
miles per hour on the return trip,
how many miles from his grandmother’s house does Jermaine live?
:
Let d = distance from grandma's house
:
Write a time equation; time = dist/speed
:
"to trip" + return trip = 2.5 hrs + = 2.5
multiply equation by 90 to get rid of the denominators, results
2d + 3d = 2.5(90)
5d = 225
d =
d = 45 mi to grandma's
:
;
Check solution by finding the times
45/45 = 1.0
45/30 = 1.5
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total: 2.5
