Divide a rectangle 30 cm long and 12 cm wide into two parts so that one part is 4 times

Divide a rectangle 30 cm long and 12 cm wide into two parts so that one part is 4 times larger than the other. Find the area of each piece.

To divide a rectangle into two parts, one of which is 4 times smaller than the other, you need to divide it into 5 equal parts, separate one part, then the remaining part will be 4 times larger.

It is convenient to divide by length, since it is a multiple of 5, 30/5 = 6;

The area of the small part will be 6 * 12 = 72 cm ^ 2, and the large part will be 24 * 12 = 288 cm ^ 2.