SOLUTION: Dave drove 330 km from his hometown to his grandma's house. During his return trip, he was able to increase his speed by 11 kph. Find the original speed and his speed in returning

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Question 984082: Dave drove 330 km from his hometown to his grandma's house. During his return trip, he was able to increase his speed by 11 kph. Find the original speed and his speed in returning home if his return took 1 hour less.

Thank you.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




So if , and the speed TO Grandma's was and the time it took was then



But we also know that the return trip speed was and the return trip time was , so:



which is to say:



Since ,



Solve for then calculate

John

My calculator said it, I believe it, that settles it