https://papers.online-conferences.com/index.php/titfl/issue/archive
153
-the performance of the second pipe.
The first pipe will fill two-thirds of the pool in
( )
the second pipe will fill one-third of the pool in
( )
According to the problem condition the first pipe fills two thirds of the basin and the second one
pipe one third of the pool in 8 h 45 min Let's make a second equation:
We obtain a system of two equations:
{
Stage II.
Work with the compiled model.
Let's solve the system of equations by substitution:
{
( )
Stage III.
Answering the task question
Since the found value of
y is
positive, it fits the meaning of the problem. So, the second pipe will fill the
pool in
.
answer: 6 h 45 min.
The creation of mathematical models facilitates the most fruitful thinking of students, as their attention is
easily and timely switched from the model to the information about the object obtained with its help and
vice versa.
When teaching students mathematics, the goal should not be to develop the many skills that are important
in mathematical modelling. The main thing is to lay the foundation for such skills and to make students
understand that in order to solve a practical problem, a mathematical model is created, which can be
represented in the form of an equation, inequalities or their systems, or a function to be investigated.
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