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A rectangular garden is 3 times as long as it is wide. Its breadth is b. Which rule gives its perimeter?

Class 6Rules and Formulas with VariablesAlgebra

A $6 b$
B $8 b$
C $3 b$
D $4 b$

Step-by-Step Solution

Length =

3 b . P = 2 \times (3 b + b) = 2 \times 4 b = 8 b . (4 b

forgets to double;

6 b

doubles only the length.)

Answer: B)

8 b

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