The sides of a rectangle are 3a + b and 7a + 2b. Find its perimeter.
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Answer:
20a + 6b
Step-by-step explanation:
Opposite sides of a rectangle are congruent
Formula of perimeter =
2 × length + 2 × breadth
2 (7a + 2b) + 2 (3a + b)
14a + 4b + 6a + 2b
14a + 6a + 4b + 2b
20a + 6b
the perimeter of the rectangle is 20a + 6b
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