A man travels first 900 Kms of his journey by train at an average speed of 80 Kms per hour, next 2000 Kms. by plane at an average speed of 300 Kms. per hour and, finally, 20 Kms. by taxi at an average speed of 30 Kms. per hour. What is his average speed for the entire journey ?

A man travels first 900 Kms of his journey by train at an average speed of 80 Kms per hour, next 2000 Kms. by plane at an average speed of 300 Kms. per hour and, finally, 20 Kms. by taxi at an average speed of 30 Kms. per hour. What is his average speed for the entire journey ?

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter10: Inequalities

Section10.3: Solving Problems Involving Inequalities

Problem 14P

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Question

A man travels first 900 Kms of his journey by
train at an average speed of 80 Kms per hour,
next 2000 Kms. by plane at an average speed of
300 Kms. per hour and, finally, 20 Kms. by taxi
at an average speed of 30 Kms. per hour. What
is his average speed for the entire journey ?

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