A person drives a car at a constant speed of 90 km/h along astraight line from p

Question

A person drives a car at a constant speed of 90 km/h along astraight line from point A to point B and then drivesback along the line from B to A at a constant speed 110 km/h. What is her average speed over the entire trip? How do I findthe average speed when this question has no information about thedistance? A person drives a car at a constant speed of 90 km/h along astraight line from point A to point B and then drivesback along the line from B to A at a constant speed 110 km/h. What is her average speed over the entire trip? How do I findthe average speed when this question has no information about thedistance?

Explanation / Answer

Given V = 90 km / h            V' = 110 km/ h Average speed V " = 2VV' / ( V + V ' )                               = 99 km / h

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.