The area of a rectangle, one side of which is 10 cm, is 500 cm2. Find its perimeter.

A rectangle is a rectangle with equal opposite sides and right angles. Its area is calculated by the formula:

S = a * b. Provided that it is 500 cm², and the width is 10 cm, we find the length of such a figure:

b = S: a = 500: 10 = 50 cm.

The perimeter (the sum of all sides) is determined by the formula:

P = 2a + 2b = 2 * 10 + 2 * 50 = 20 + 100 = 120 cm.

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