SOLUTION: One morning, John drove 5 hours before stopping to eat. After lunch, he increased his speed by 10 mph. If he completed a 310-mile trip in 8 hours of driving time, how fast did he d

Question 323096: One morning, John drove 5 hours before stopping to eat. After lunch, he increased his speed by 10 mph. If he completed a 310-mile trip in 8 hours of driving time, how fast did he drive in the morning?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the distance he drove in AM
Let = his speed in the AM
hrs driving time in PM
given:

By substitution:

He drove 35 mi/hr in the AM
check:

OK
RELATED QUESTIONS
One morning, John drove 5 hours before stopping to eat. After lunch he increased his... (answered by rajagopalan)

One morning, John drove 11 hours before stopping to eat. After lunch, he increased his... (answered by Nihal@SriLanka)

One morning, John drove 5 hours before stoping to eat. After lunch, he increased his... (answered by ankor@dixie-net.com)

One morning, Justin drove 5 hours before stopping to eat lunch at Chick-fil-A. After... (answered by ikleyn)

One morning, Justin drove 2 hours before stopping to eat lunch at Chick-fil-A. After... (answered by ikleyn)

One morning, Justin drove 3 hours before stopping to eat lunch at Chick-fil-A. After... (answered by Boreal)

One morning, Justin drove 3 hours before stopping to eat lunch at Chick-fil-A. After... (answered by ikleyn,ewatrrr,MathTherapy)

One morning, Justin drove 2 hours before stopping to eat lunch at Pizza Hut. After lunch, (answered by nshah11)

One morning, Justin drove 3 hours before stopping to eat lunch at Pizza Hut. After lunch, (answered by Menjax)