SOLUTION: Carlos drives from Point-A to Point-B at an average speed of 36 miles per hour. He returns along the identical route at an average speed that is faster than 36 miles per hours. Whe

Question 1166933: Carlos drives from Point-A to Point-B at an average speed of 36 miles per hour. He returns along the identical route at an average speed that is faster than 36 miles per hours. When he gets back (to Point-A), he realizes that his average speed for the overall roundtrip was 40 miles per hour. What was his average speed on the return trip (from Point-B to Point-A) ?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!

             SPEED        TIME       DISTANCE

A to B       36           d/36          d

B to A       r            d/r           d

TOTALS               d/36+d/r          2d

Average speed for whole round trip, 40 mph.

---------simplify and solve for r.
RELATED QUESTIONS
Peter drives from his home to the store at an average speed of 40 miles per hour. He... (answered by ankor@dixie-net.com)

Danielle drives from her home to the store at an average speed of 40 miles per hour. She... (answered by amoresroy)

Sally drives to work at an average speed of 47 mph and returns along the same route at a... (answered by Alan3354)

Marcus drives to school at an average speed of 24 miles per hour and returns home along... (answered by Alan3354,jorel555)

A person drives from point A to point B at 30 miles per hour. What must the driving... (answered by Edwin McCravy)

Danielle drives from her home to the store at an average speed of 40mph. She returns... (answered by algebrahouse.com)

a jet flies from los angeles to chicago at an average speed of 440 miles per hour. if it... (answered by josgarithmetic,MathTherapy)

A plane flies from Worcester to Chicago at an average rate of 380 mph and returns along... (answered by richwmiller)

Nico drives from school to the store at 25 miles per hour. He drives back to school... (answered by rfer)