SOLUTION: if john travel 10 miles at 5 miles per hour,12 miles at 4 miles per hour, and 18 in three hours, what was his average speed for the trip

SOLUTION: if john travel 10 miles at 5 miles per hour,12 miles at 4 miles per hour, and 18 in three hours, what was his average speed for the trip

Algebra.Com

Question 293216: if john travel 10 miles at 5 miles per hour,12 miles at 4 miles per hour, and 18 in three hours, what was his average speed for the trip
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Notice: It is 18 in three hours for 6 mph
It is not (5+4+6)/3=15/3=5 mph
d=r*t
10=5*2
12=4*3
18=6*3
average r=d/t
(10+12+18)/(2+3+3)=40/8=5 mph

RELATED QUESTIONS
Tom walked to the meeting at 2 miles per hour and caught a ride home in an old truck at... (answered by stanbon,Edwin McCravy)

If you travel for 1 hour at 10 miles per hour and 2 hours at 25 miles per hour. What is... (answered by stanbon,Alan3354,srinivas.g)

A man travel upstream at 8 miles per hour and downstream 12 miles and hour. This took... (answered by prabhjyot)

A motorist travels at 30 miles/hour for 2 hours and 60 miles/hour for 1 hour. What is his (answered by rfer)

Traveling from Los Angeles to San Diego, Peter drove 30 miles at 30 miles per hour, 35... (answered by ewatrrr)

He drove 150 miles in 2.5 hours. What was his average speed, in miles per hour? (answered by colliefan)

Davis traveled 1300 miles in 8 hours What was his average miles per hour (answered by rfer)

Fred has 5 hours at his disposal. How far (in miles) can he ride his bicycle, going at 10 (answered by richwmiller,Edwin McCravy)

Mr grainier, a cyclist rode from his home to his office at an average speed of 18 miles... (answered by ikleyn)