Send to a Friend
Can someone explain this physics problem?
)
September 14th, 2011
My physics professor had the class attempt to solve a word problem the other day. I don’t think anyone was really able to understand it and even the professor was a little confused. We eventually settled on answer choice C, but I don’t understand why. Can anyone here explain it to me? Here’s the problem:
“A motorist wishes to travel 40km at an average speed of 40km/h. During the first 20km, an average speed of 40km/h is maintained. However, during the next 10km, the motorist averages only 20km/h. In order to drive the last 10km and still average 40km/h, the motorist must drive…
A.) 60km/h
B.) 80km/h
C.) 90km/h
D.) Faster than the speed of light
Using Fluther
or
