Question

The length of the grectangle is loom and
Perimeter is 30cm, what is, the other side?​

Answer 1

Answer:

Correct Question :-

• The length of a rectangle is 10 cm and its perimeter is 30 cm. What is the other side.

Given :-

• The length of a rectangle is 10 cm and its perimeter is 30 cm.

To Find :-

• What is the other side.

Solution :-

Let, the other side or breadth be b

We know that,

✪ Perimeter of a rectangle = 2(Length + Breadth) ✪

According to the question,

⇒ 2(L + B) = 30

⇒ 2(10 + b) = 30

⇒ 20 + 2b = 30

⇒ 2b = 30 - 20

⇒ 2b = 10

⇒ b = $\dfrac{\cancel{10}}{\cancel{2}}$

➠ b = 5 cm

Hence, the breadth or other side of a rectangle is 5 cm

∴ The other side of a rectangle is 5 cm .

Answer 2

$\huge\bf{Answer :- }$

Given :-

• Length of rectangle = 10cm

• Perimeter of rectangle = 30cm

To Find :-

• Other side of the rectangle(Breadth)

Solution :-

Let, The other side be x

We know that,

Perimeter of rectangle = 2( length + Breadth )

By substituting values,

➙ 2(10cm + x) = 30cm

➙ 20 + 2x = 30cm

➙ 2x = 30cm - 20cm

➙ 2x = 10cm

➙ x = 10/2

➥ x = 5cm

Hence, The other side ( Breadth) of the rectangle is 5cm

Proof :-

Perimeter of the rectangle = 2( length + breadth)

➙ 30cm = 2(10cm + 5cm )

➙ 30cm = 2(15cm)

➥ 30cm ⇔ 30cm

Hence, Proved