In the store, a rectangular showcase was decorated with lanterns around the perimeter. The area of the windscreen is 28 m2

In the store, a rectangular showcase was decorated with lanterns around the perimeter. The area of the windscreen is 28 m2., The height is 4 m. How many flashlights were used, if there were 15 of them on each meter.

To solve this problem, you first need to find the width of the showcase, then find the perimeter of the showcase, and finally multiply this number by the number of flashlights on each meter.

Let’s find the width of the showcase.

28/4 = 7 m

Find the perimeter of the showcase.

7 * 2 + 4 * 2 = 14 + 8 = 22 m

Let’s find the number of flashlights.

22 * 15 = 330 flashlights

Answer: We used 330 flashlights.