BuyFind

Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805
BuyFind

Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

Solutions

Chapter 1, Problem 15P
To determine

To find: The average speed during the whole trip.

Expert Solution

Answer to Problem 15P

Solution:

The average speed is 40 mi/h.

Explanation of Solution

Given:

Speed during the first half distance = 30 mi/h

Speed during the second half distance = 60 min/h

Result used:

Average speed=Total distanceTotal time

Calculation:

Let t1 be the time taken for the first half.

Let t2 be the time taken for the second half.

Distance traveled on each half on the trip is d

Therefore, the total distance is 2d.

From the given data the time taken for the first half trip is t1=d30.

Time taken for the second half trip is t2=d60.

Average speed=2dt1+t2=2dd30+d60=2d3d60=40

Thus, the average speed is 40 mi/h.

Have a homework question?

Subscribe to bartleby learn! Ask subject matter experts 30 homework questions each month. Plus, you’ll have access to millions of step-by-step textbook answers!