Question

The length of a rectangular hall is 7 metres less than 4 times the breadth of the hall. What is the length, if the breadth is 'b' metres?​

Answer 1

Answer:

• Length of hall is (4b-7) metres.

Step-by-step explanation:

According to the Question

It is given that,

length of a rectangular hall is 7 metres less than 4 times the breadth of the hall

Let the breadth be b m

According to the Given Statement

length of a rectangular hall is 7 metres less than 4 times the breadth of the hall.

Length of hall = 4× breadth of hall -7

↠ Length of hall = (4b - 7) metres

• Hence, the length of the hall is (4b-7) metres.

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:

Question :-

• The length of a rectangular hall is 7 metres less than 4 times the breadth of the hall. What is the length, if the breadth is 'b' metres ?

Given :-

• The length of a rectangular hall is 7 metres less than 4 times the breadth of the hall.

To Find :-

• What is the length, if the breadth is 'b' metres.

Solution :-

Given :

$\mapsto \bf Breadth_{(Rectangular\: Hall)} =\: b\: metres$

$\dag$ According to the question :

$\bigstar$ The length of a rectangular hall is 7 metres less than 4 times the breadth of the hall.

So,

$\footnotesize \implies \sf\bold{\pink{Length_{(Rectangular\: Hall)} =\: (4 \times Breadth_{(Rectangular\: Hall)} - 7)}}$

$\implies \sf Length_{(Rectangular\: Hall)} =\: (4 \times b - 7)$

$\implies \sf Length_{(Rectangular\: Hall)} =\: (4b - 7)$

$\implies \sf Length_{(Rectangular\: Hall)} =\: (4b - 7)\: metres$

$\implies \sf\bold{\red{Length_{(Rectangular\: Hall)} =\: (4b - 7)\: metres}}$

$\small \sf\bold{\purple{\underline{\therefore\: The\: length\: of\: a\: rectangular\: hall\: is\: (4b - 7)\: metres\: .}}}$

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