It takes a farmer 12 minutes to walk around the perimeter of a rectangular field

It takes a farmer 12 minutes to walk around the perimeter of a rectangular field without stopping. Its speed is 100m / min. How wide is this field if its length is 500m.

In order to complete this task, we must first calculate what the perimeter of the field is, knowing that it can be bypassed in 12 minutes moving at a speed of 100 meters per minute. To find the distance you need to multiply the time by the speed.

s = 12 * 100 = 12,000 meters.

Knowing that the perimeter is 12,000 meters, and the length is 500 meters, we calculate what the width of the field is. The perimeter of a rectangle is twice the sum of its length and width.

(a + 500) * 2 = 12,000;

a + 500 = 12,000 / 2;

a + 500 = 6,000;

a = 6,000 – 500;

a = 5500 meters.

Answer: 5500 meters.