Question

pls answer is very urgent​

Answer 1

Answer:

Length = 34m

Breadth = 2m

Step-by-step explanation:

length, l = 5x + 4

breadth, b = x - 4

Perimeter, P = 72 m

P = 2(l + b)

72 = 2(5x + 4 + x - 4)

2(6x) = 72

12x = 72

x = 72/12

x = 6

so l = 5*6 + 4 = 34 m

b = 6 - 4 = 2 m

Answer 2

Question :-

Find the length and breadth of a rectangle given below if it's perimeter is 7.

$\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered} \: \: \: \sf{x - 4 \: \: }\boxed{\begin{array}{cc} \\ \\\\ \sf\green{\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:\:\:\:\:\:\:}\\ \end{array}} \\ \sf{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 5x + 4}\end{gathered}\end{gathered}\end{gathered}\end{gathered}\end{gathered}$

Solution :-

Given :

• Length = 5x + 4
• Breadth = x - 4
• Perimeter = 72m

Need to find :

• Length and breadth

Required formula :

Perimeter of rectangle = 2(l + b)

Then,

$\sf:\longmapsto{72 = 2(5x + 4 + x - 4)} \\ \\ \sf:\longmapsto{72 = 2(6x)} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \sf:\longmapsto{72 = 12x} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \sf:\longmapsto{x = 6} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

Length :

→ 5(6) + 4

→ 30 + 4

→ 34

Breadth :

→ 6 - 4

→ 2

Answer :

• Length = 34m
• Breadth = 2m

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