SOLUTION: Jack drives 2 hours at a speed of 3 km/hr and 3 hrs at 40 km/hr. What is his average speed for the entire trip?
Algebra.Com
Question 606276: Jack drives 2 hours at a speed of 3 km/hr and 3 hrs at 40 km/hr. What is his average speed for the entire trip?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Multiply rate for the first part of the trip times the time for the first part of the trip to find out how much distance he traveled for the first part. Then multiply the rate for the second part of the trip times the time for the second part of the trip to find the distance for that part. Add these two distances then divide by the total time for the whole trip.
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
A car travels at 95 km/hr for 2 hrs. at 65 km/hr for the next 3 hrs and finally at 75... (answered by Alan3354)
A student drives from home to school at an average speed of 40 km/hr and returns home at... (answered by ankor@dixie-net.com)
if you bike a distance of 10 km at 30 km/hr, and then return at 20 km/hr, what is the... (answered by josgarithmetic)
A train runs for 2 hours at speed of 40 km/hr. It run for 4 1/2 hour at speed of 60... (answered by Alan3354)
Suppose a driver with car leaves home at 8AM and first travels 30 km/hr for two hours,... (answered by ankor@dixie-net.com,ikleyn,MathTherapy)
a scooterist drives at a speed of 40 km/hr and reaches his destination 5 minutes late. If (answered by lwsshak3)
In the first half (distance) of a trip, a truck travels at a speed of 40 km/hr. How fast... (answered by ankor@dixie-net.com)
a man completes 30 km of a journey at the speed of 6 km/hr and the remaining 40 kms of... (answered by Edwin McCravy)
a man completes 30 km of a journey at the speed of 6 km/hr and the remaining 40 kms of... (answered by ankor@dixie-net.com)
