The width of the rectangle is 28 cm which is 4/7 of its length. Find the perimeter of the rectangle.

According to the condition of the task, it is necessary to find the perimeter of the rectangle if its width is 4/7 of the length and is 28 cm.

First of all, you need to find the length. In order to find out the value of an integer, if its part is known, it is necessary to multiply it by the denominator of the fraction and divide by the numerator:

28 * 7: 4 = 196: 4 = 49 cm.

The sum of the parties’ milestones is determined by the formula:

P = 2a + 2b.

Substitute the known values and write the expression:

P = 2 * 49 + 2 * 28 = 98 + 56 = 154 cm.