Question

Area of rectangle is 40cm and breath is 4cm what is the length?​

Answer 1

Answer:

• 10cm is the required length of rectangle.

Step-by-step explanation:

According to the Question

It is given that,

• Area of Rectangle = 40cm²
• Breadth ,b = 4cm

we have to calculate the length of rectangle.

Let the length of rectangle be l

As we know ,

Area of Rectangle = Length × Breadth

substituting the value we get

→ 40 = l × 4

→ 40/4 = l

→ l = 40/4

→ l = 10 cm

• Hence, the length of rectangle is 10cm.

Additional Information !!

$\begin{gathered}\boxed{\begin {array}{cc}\\ \quad \Large\underline{\bf Formulas\:of\:Areas:-}\\ \\ \star\sf Square=(side)^2\\ \\ \star\sf Rectangle=Length\times Breadth \\\\ \star\sf Triangle=\dfrac{1}{2}\times Breadth\times Height \\\\ \star \sf Scalene\triangle=\sqrt {s (s-a)(s-b)(s-c)}\\ \\ \star \sf Rhombus =\dfrac {1}{2}\times d_1\times d_2 \\\\ \star\sf Rhombus =\:\dfrac {1}{2}d\sqrt {4a^2-d^2}\\ \\ \star\sf Parallelogram =Breadth\times Height\\\\ \star\sf Trapezium =\dfrac {1}{2}(a+b)\times Height \\ \\ \star\sf Equilateral\:Triangle=\dfrac {\sqrt{3}}{4}(side)^2\end {array}}\end{gathered}$

Answer 2

Answer:

Appropriate Question :-

• The area of rectangle is 40 cm² and breadth is 4 cm. What is the length ?

Given :-

• The area of a rectangle is 40 cm² and breadth is 4 cm.

To Find :-

• What is the length.

Formula Used :-

$\clubsuit$ Area Of Rectangle Formula :

$\bigstar \: \: \sf\boxed{\bold{\pink{Area_{(Rectangle)} =\: L \times B}}}\: \: \: \bigstar$

where,

• L = Length
• B = Breadth

Solution :-

Let,

$\mapsto \bf Length_{[Rectangle]} =\: x\: cm$

Given :

• Area = 40 cm²
• Breadth = 4 cm

According to the question by using the formula we get,

$\implies \sf\bold{\blue{Area_{(Rectangle)} =\: L \times B}}$

$\implies \bf Area_{(Rectangle)} =\: Length \times Breadth$

$\implies \sf 40 =\: x \times 4$

$\implies \sf 40 =\: 4x$

$\implies \sf \dfrac{\cancel{40}}{\cancel{4}} =\: x$

$\implies \sf \dfrac{10}{1} =\: x$

$\implies \sf 10 =\: x$

$\implies \sf\bold{\green{x =\: 10}}$

Hence, the required length of the rectangle is :

$\dashrightarrow \sf Length_{[Rectangle]} =\: x\: cm$

$\dashrightarrow \sf\bold{\red{Length_{[Rectangle]} =\: 10\: cm}}$

$\sf\bold{\purple{\underline{\therefore\: The\: length\: of\: the\: rectangle\: is\: 10\: cm\: .}}}$

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