Asked by Mike

A motorist travels 120 miles to his destination at an average speed of 60 miles per hour and returns at an average
speed of 60 miles per hour and returns to the starting point at an average speed of 40 miles per hour. What is his average
speed for the entire trip
Answered by Damon
Well did he go 60 or 40 on the way back?
Answered by Ivan
Wow so do you seriously not know what the answer is Damon? Or are you just this stupid not to answer someone's question? Seriously . . . just wondering do you not know the answer?
Answered by Damon
Anyway, find the total time for the round trip by adding the time out and the time back.

Then divide 240 miles by the time in hours
Answered by Ms. Sue
Whoa! Be careful who you call stupid, Ivan! Damon is a retired Harvard physics professor.

Answered by Damon
MIT, Ocean Engineering.
BSc in Physics but went back later for engineering doctorate and taught engineering.
Answered by Ms. Sue
Oops -- I was close -- but all wrong!
Answered by Damon
LOL - close enough, a short lunchtime walk.
Answered by Writeacher
Ivan is a complete boor and needs to find somewhere else to post. He clearly didn't read the original question here, not did he seem to understand Damon's question in reply.

=(
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