Answer:
or
Explanation:
The question in English is
During the week 72 children will visit the park. For each child is prepared a rectangular box, in which to arrange what will be collected during the visit. Each box is 18 cm long and 12 cm wide. How long is the strip of cardboard that is used to make the edge of all boxes.
Let
x ----> the length of the box
y -----> the width of the box
we know that
The perimeter of the box is equal to
we have
step 1
Find the perimeter of one box
step 2
Find the perimeter of 72 box
Multiply the perimeter of one box by 72
Convert to meters
Divide by 100