A square with a side of 3 cm was cut into strips 5 mm wide and the strips were laid

A square with a side of 3 cm was cut into strips 5 mm wide and the strips were laid out in one line. What is the perimeter of the resulting shape?

For the convenience of the calculation, we will translate all the values ​​specified according to the condition of the problem into the same units of measurement – in millimeters. Since there are 10 millimeters in one centimeter, therefore:

3 cm = 3 * 10 = 30 mm side length of the square.

Now we will find how many stripes have turned out – we divide the length of the side of the square by 5 millimeters:

30: 5 = 6 strips

Thus, we will have 6 strips 30 mm long and 5 mm wide. Let’s find the total length of the resulting rectangle:

30 * 6 = 180mm

Now we can find the perimeter of a given rectangle 180 mm long and 5 mm wide:

2 * (180 + 5) = 2 * 185 = 370 mm

Answer: the perimeter of the resulting figure is 370 mm or 37 cm.