Question

The length of a rectangular park is thrice its breadth. If the perimeter of the park is 168 metres. Find its dimension

Answer 1

Answer: 21m , 63m

Step-by-step explanation:

lenght = 3b m

breadth = b m

perimeter = 2(l+b)

=2*(b+3b)

= 2(4b) = 8b = 168

= b = 21 m

l = 21*3 = 63 m

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Answer 2

ANSWEƦ

Let the breadth be $q$.

Let the length be $3q$.

ATQ,

Perimeter of the rectangular park = 168m

$\begin{gathered} 2 (l \: + \: b) = 168m \\ \implies 2 (3a + a) = 168m \\ \implies 2 (4a) = 168m \\ \implies 8a = 168m \\ \implies a = \cancel{ \dfrac{168}{8} } \\ a = 21m \end{gathered}$

Breadth = 21m

Length = 21m × 3 = 63m