Question

breadth of a rectangle is 5 cm and length is 3 times of its breadth find the perimeter and area​

Answer 1

Step-by-step explanation:

a=5

b=3a=3×5 = 15

perimeter =2(a+b)

= 2(5+15)

=2×20

=40 cm

area = ab

=15×5

=75 cm²

Answer 2

Solution:-

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$\large\to{\underbrace{\underline{\sf{Understanding\:the\:concept:-}}}}$

$\implies$ Here it is given in the question that the length of a rectangle is 3 times its breadth and its breadth is 5 cm. Now the question has asked us to find out the perimeter and area of the given rectangle.

✧ HOW TO DO:-

$\longrightarrow$ To find the perimeter and the area of the given rectangle first of all we need to find its length. So, according to the question the length is 3 times of the breadth. By forming an equation we can find the area and perimeter by putting the values in the formula. Follow the steps to get the answer.

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ANSWER:-

⪼ Perimeter of the rectangle is 40 cm.

⪼ Area of the given rectangle is 75 cm².

GIVEN:-

➤ Length of the rectangle = 3 times the breadth

➤ Breadth of the rectangle = 5 cm

TO FIND:-

• Here we have to find out the area and perimeter of the given rectangle.

SOLUTION:-

• First of all we will find the length.
• We have to form an equation.
• Equation = 5 × 3

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So, let's solve it!

• Finding the length:-

⇝ Length = 5 cm × 3

⇝ Length = 5 cm × 3 = 15

⇝ Length = 15 cm

Thus, the length is 15 cm.

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• Now, as we got the length we can easily find out the area and perimeter.
• First, we will find the perimeter.

We know that:-

$\pink{\bigstar} \underline{\boxed{\rm Perimeter \: of \: rectangle = 2(L + B)}}$

Here:-

• L = 15 cm
• B = 5 cm

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So, let's solve it!

• Finding the Perimeter:-

⇝ Perimeter = 2(15 cm + 5 cm)

⇝ Perimeter = 2 × 20 cm

⇝ Perimeter = 40 cm

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• Now let's find the area using its formula.

We know that:-

$\pink{\bigstar} \underline{\boxed{\rm Area \: of \: rectangle = L \times B}}$

Here:-

• L = 15 cm
• B = 5 cm

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So, let's solve it!

• Finding the area:-

⇝ Area = 15 cm × 5 cm

⇝ Area = 15 cm × 5 cm = 75 cm²

⇝ Area = 75 cm²

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