Question

Ying Zyiyu covers the first 200 miles of a trip travelling at 50 mph. and the last hundred miles traveling at 40 mph. What was his average speed for the entire trip?

Answer 1

Step-by-step explanation:

We need to know the duration the Ting traveled at each speed, then we can find the average speed. This can be divided into two parts:

Part 1. Find the duration traveled at each speed

Ting covered 200 miles at 50 miles/hour

To find duration traveled at 50mph --> (200 miles)/(50mph) = 4 hours (traveling at 50 mph)

Ting traveled 100 miles at 40 mph

To find duration traveling at 40mph --> (100 miles)/(40mpg) = 2.5 hours (traveling at 40mph)

Part 2. Find average speed

Average speed = total distance/total time

(200 miles + 100 miles)/(4hours + 2.5hours) = 46.2 mph is the average speed