Find the perimeter of the rectangle, the area of which is 5m2 and one of the sides is 2 / 5m.

1. Divide the area of the rectangle by one of its sides, we get the second unequal side of the rectangle:
5 m2: 2/5 m = 5 * 5/2 = 25/2 = 12.5 m.
2. Now let’s find out the length of the perimeter, as the doubled value of the sum of two unequal sides of the rectangle:
Perimeter = 2 * (2/5 + 12.5) = 2 * (2/5 + 125/10) = 2 * (4/10 + 125/10) = 2 * 129/10 = 129/5 = 25, 8 m.
Answer: in the end, we got that the perimeter of the rectangle is 25.8 m.