The perimeter of the rectangle is 48 cm. Find its sides if they are 3: 5.

univerkov | December 6, 2020 | education

Given:
P = (a + b) * 2 = 48 cm
a = 3x
b = 5x
Find: a =?, B =?
Decision:
P = (a + b) * 2 = (3x + 5x) * 2 = 8x * 2 = 16x
means 16x = P = 48 cm
means x = 48/16 = 3 cm
then: a = 3x = 3 * 3 cm = 9 cm
b = 5x = 5 * 3 cm = 15 cm
check: P = (a + b) * 2 = (9 cm + 15 cm) * 2 = 24 cm * 2 = 48 cm, agreed with the condition.
Answer: the sides are 9 cm and 15 cm

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.