

This solution starts by responding directly to what is ASKED FOR:
Development of the
solution is easily done using the symbolic algebra available in
SureMath  the math software for 21st century problem
solving.
Find the rate of the plane in miles per hour.
A simple concept is used: d=vt.
Everybody knows this relationship! The organized problem solution shows the student the reliable, common sense way to solve problems involving distance, time, and velocity.
The Answer Book solution provides no longterm guidance, being convenient only for the values given. The basic concept of d=vt is not mentioned.