Wendy travelled 300 km. She travelled part of the way (a distance of x km) by bus and arrived at the train station just in time to complete her journey by train. The average speed of the bus was 40 km per hour and on average the train travelled 20 km per hour faster than the bus. The entire trip took 5 hours. Which one of the following equations can be used to solve for r? 300 – x + 40 11 1. 20 2 X – 300 11 2. 40 20 2 11 300 – x 3. 40 2 20 300 – x 11 4. 40 60 2 11 L – 300 40 60 5.

Wendy travelled 300 km. She travelled part of the way (a distance of x km) by bus and arrived at the train station just in time to complete her journey by train. The average speed of the bus was 40 km per hour and on average the train travelled 20 km per hour faster than the bus. The entire trip took 5 hours. Which one of the following equations can be used to solve for r? 300 – x + 40 11 1. 20 2 X – 300 11 2. 40 20 2 11 300 – x 3. 40 2 20 300 – x 11 4. 40 60 2 11 L – 300 40 60 5.

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Concept explainers

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.

Question

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Wendy travelled 300 km. She travelled part of the way (a distance of x km) by bus and arrived at
the train station just in time to complete her journey by train. The average speed of the bus was 40
km per hour and on average the train travelled 20 km per hour faster than the bus. The entire trip
took 5 hours. Which one of the following equations can be used to solve for r?
300 – x
+
40
11
1.
20
2
X – 300
11
2.
40
20
2
11
300 – x
3.
40
2
20
300 – x
11
4.
40
60
2
11
L – 300
40
60
5.

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