Question

1. What is the perimeter of a rectangle whose length is 10 cm and breadth is 7 cm?
2. What is the perimeter of a square of side 5 cm?
3. What is the formula for the area of a rectangle?
4. What is the formula for the area of a square?
5. How many centimeters are there in one metre?​

Answer 1

★Question 1 :

⇛What is the perimeter of a rectangle whose length is 10 cm and breadth is 7 cm ?

★Solution :

⇛ Perimeter of rectangle = 2(l + b)

Let us consider that,

• L = 10 and b = 7

☛ Perimeter of rectangle = 2(10+7)

☛ $\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$ = 2(17)

☛$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$= 34 cm

Therefore, The perimeter of rectangle is 34 cm.

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★Question 2 :

➽ What is the perimeter of a square of side 5cm?

★Solution :

➽ Perimeter of square = 4 × a

Let us consider that,

• a = 5

☛ Perimeter of square = 4 × 5

☛ Perimeter of square = 20 cm

Therefore, The perimeter of a square is 20 cm.

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★Question 3 :

⇛ What is the formula for the area of a rectangle ?

★Solution :

• The formula used for area of rectangle is Length × Width

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★Question 4 :

⇛ What is the formula for area of square ?

★Solution :

• The formula used for area of square is $a^2$

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★Question 5 :

☞ How many centimeters are there in one metre ?

★Solution :

• 1 Metre = 100 centimeters

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Answer 2

Answer:

★Question 1 :

⇛What is the perimeter of a rectangle whose length is 10 cm and breadth is 7 cm ?

★Solution :

⇛ Perimeter of rectangle = 2(l + b)

Let us consider that,

L = 10 and b = 7

☛ Perimeter of rectangle = 2(10+7)

☛ \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\: = 2(17)

☛\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\: = 34 cm

Therefore, The perimeter of rectangle is 34 cm.

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★Question 2 :

➽ What is the perimeter of a square of side 5cm?

★Solution :

➽ Perimeter of square = 4 × a

Let us consider that,

a = 5

☛ Perimeter of square = 4 × 5

☛ Perimeter of square = 20 cm

Therefore, The perimeter of a square is 20 cm.

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★Question 3 :

⇛ What is the formula for the area of a rectangle ?

★Solution :

The formula used for area of rectangle is Length × Width

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★Question 4 :

⇛ What is the formula for area of square ?

★Solution :

The formula used for area of square is a^2a

2

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★Question 5 :

☞ How many centimeters are there in one metre ?

★Solution :

1 Metre = 100 centimeters

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