The width and length of the rectangle are inversely proportional to the numbers 9 and 7.
| July 1, 2021 | education
The width and length of the rectangle are inversely proportional to the numbers 9 and 7. a) Find the area of the rectangle if its width is 14 mm. b) find the perimeter of the rectangle if the width is less than the length by 20 cm
a) S = a * b; a = 14 => b = 14/7 * 9 = 2 * 9 = 18 mm; S = 14 * 18 = 252 mm ^ 2; Answer: 252 mm. sq.
b) Let the width be a cm, then the length is (a + 20) cm. P = (a + (a + 20)) * 2 = (2a + 20) * 2 = 4a + 40 cm.
Answer: (4a + 40) see Explanation: Knowing the formulas for the perimeter and area, we substitute the given values for us and calculate.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
