Find the area and perimeter of a rectangle if it is 4 cm wide and 3 times longer.

First, let’s find the length of the rectangle. By condition, it is 3 times the width, that is, the length is 4 * 3 = 12 cm;

Since the opposite sides of the triangle are equal to each other, the perimeter of the rectangle is (4 + 12) * 2 = 32 cm;

The area of a rectangle is equal to the product of length and width, that is, 12 * 4 = 48 sq. Cm.