Calculate the perimeter and area of a rectangle if the length of one of its sides is 10 cm 8 mm

Calculate the perimeter and area of a rectangle if the length of one of its sides is 10 cm 8 mm, and the length of the other is 6 times less.

The task:
length of rectangle a – 10 cm 8 mm,
the width of the rectangle b -?, 6 times less than a,
perimeter P -?
area S -?
Decision:
1) define the width of the rectangle b:
10.8: 6 = 1.8 centimeters;
2) calculate the perimeter of the rectangle:
P = (a + b) 2 = (10.8 + 1.8) 2 = 25.2 centimeters;
3) find the area of the rectangle:
S = a b = 10.8 1.8 = 19.44 square centimeters.
Answer: P = 25.2 centimeters, S = 19.44 square centimeters.