Question

3
7
(12) The length and breadth of a rectangle
are 5 3/4cm and 2 7/8 cm respectively.
Find its perimeter.

​

Answer 1

Answer:

69/4

Step-by-step explanation:

perimeter of rectangle formula = 2(l+w) , where " l " denotes length & " w" denotes width

=>2[(23/4)+(23/8)]

answer = 69/4 .

Answer 2

Correct Question :-

• The length and breadth of a rectangle are 5 3/4 cm and 2 7/8 cm respectively. Find its perimeter.

Answer :-

• The perimeter of the rectangle is 69/4 cm.

To find :-

• The perimeter of the rectangle.

Step-by-step explanation :-

• Here, the length and breadth of a rectangle are given to us. We have to find it's perimeter.

We know that :-

$\underline{\boxed{ \sf Perimeter \: of\: a \: rectangle = 2\:(L + B)}}$

Where,

• L = Length.

• B = Breadth.

Here,

• Length = 5 3/4 cm.
• Breadth = 2 7/8 cm.

Therefore,

$\longrightarrow \rm{2\:(L + B)}$

Substituting the values of L and B,

$\longrightarrow \rm{2\:\bigg(\dfrac{23}{4} + \dfrac{23}{8} \bigg)}$

Finding the L.C.M of 8 and 4, we get the LCM as 8.

$\longrightarrow \rm{2\:\bigg(\dfrac{69}{8} \bigg)}$

$\longrightarrow \rm{2\:\bigg(\dfrac{69}{8} \bigg)}$

$\longrightarrow \rm{2 \times \dfrac{69}{8}$

$\longrightarrow \rm{\bigg(\dfrac{69}{4} \bigg)}$

Hence :-

• The perimeter of the rectangle is 69/4 cm.

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