Question

The area of a rectangle is 400m² and its length is 40m. Find its breadth and perimeter.

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Answer 1

Answer:

• breadth = 10 m
• Perimeter = 100 metres

Explanation:

Let the breadth be b metre

• Area of rectangle = 400 m²
• Length of rectangle ,l = 40 m

Now, we know that area of rectangle is the product of length and breadth . So,

• Area of rectangle = length × breadth

→ 400 = 40 × b

→ 400/40 = b

→ 10 = b

→ b = 10 m

• Hence, the breadth of the rectangle is 10 metres

Now, calculating the perimeter of the rectangle

• Perimeter of rectangle = 2 (length+breadth)

→ Perimeter of rectangle = 2 (40+10)

→ Perimeter of rectangle = 2×50

→ Perimeter of rectangle = 100 m

• Hence, the perimeter of the rectangle is 100 metres.

Answer 2

Answer:

Given :-

• Area of Rectangle = 400 m²
• Length = 40 m

To Find :-

• Breadth
• Perimeter

Solution :-

At first we need to find the breadth of rectangle. Then we need to find the perimeter by using the formula.

$\mid \pmb{Breadth = \dfrac{Area}{Length}} \mid$

Breadth = 400/40

Breadth = 40/4

Breadth = 10 m

Finding Perimeter

$\mid \pmb{Perimeter = 2( \ell + b)} \mid$

$\sf \: Perimeter = 2(40 + 10)$

$\sf \: Perimeter = (2 \times 40) + (2 \times 10)$

$\sf \: Perimeter = 80 + 20$

$\sf \: Perimeter = 100 \: m$