Find the perimeter and area of the rectangle if the width is 10 cm and the length is 4 times more.

Let’s solve this task in steps and explain each of them in detail.
1) 10 * 4 = 40 centimeters – the length of the rectangle, since it is 4 times longer than the width, and the width is 10 centimeters;
2) 40 * 10 = 400 square centimeters – the area of a rectangle, since its length is 40 centimeters and its width is 10 centimeters;
3) 2 * (40 + 10) = 2 * 50 = 100 centimeters – the perimeter of the rectangle, since its length is 40 centimeters and its width is 10 centimeters.
Answer: 400 square centimeters; 100 centimeters.