Question

The length of a rectangular hall is 4 meters less
than 3 times the breadth of the hall. What is the
length, if the breadth is b meters?
​

Answer 1

Given :

• The length of a rectangular hall is 4 meters less than 3 times the breadth of the hall.
• Breadth of hall = b meter's

To Find :

• Length of rectangle = ?

Solution :

• Breadth of hall = b meter's
• Length of rectangle = ?

★ According to Question now :

• The length of a rectangular hall is 4 meters less than 3 times the breadth of the hall :]

→ Length of rectangular hall = 3 × (Breadth of rectangular hall) - 4

→ Length of rectangular hall = 3 × b - 4

→ Length of rectangular hall = 3b - 4 m

• Hence,the length of the rectangular hall is 3b - 4 m.

★ Formulas related to rectangle and square :

• Area of rectangle = length× breath
• Diagonal of rectangle = √(length ²+breadth ²)
• Perimeter of square = 4× side
• Area of square = side²

Answer 2

$\huge{\boxed{\rm{Question}}}$

The length of a rectangular hall is 4 meters less than 3 times the breadth of the hall. What is the length, if the breadth is b meters?

$\huge{\boxed{\rm{Answer}}}$

$\large{\boxed{\boxed{\sf{Given \: that}}}}$

• The length of a rectangular hall is 4 meters less than 3 times the breadth of the hall.

• Let the breadth is b meter.

$\large{\boxed{\boxed{\sf{To \: find}}}}$

• Length.

$\large{\boxed{\boxed{\sf{Solution}}}}$

• Length = 3b-4 m

$\large{\boxed{\boxed{\sf{We \: also \: write \: these \: as}}}}$

• Length as L.

• Breadth as B.

$\large{\boxed{\boxed{\sf{What \: does \: the \: question \: says}}}}$

$\large{\boxed{\boxed{\sf{Let's \: understand \: the \: concept \: 1st}}}}$

• This question says that the length of a rectangular hall is 4 meters less than 3 times the breadth of the hall afterwards it says that the breadth is b meters. Now, it ask us to find the length.

$\large{\boxed{\boxed{\sf{How \: to \: do \: this \: question}}}}$

$\large{\boxed{\boxed{\sf{Let's \: see \: the \: procedure \: now}}}}$

• To solve this problem we have to use the formula to find length. After that putting the values we get 3b-4 as the length of rectangular hall.

$\large{\boxed{\boxed{\sf{Full \: solution}}}}$

According to the question let's see it again what is given and what to solve !

• The length of a rectangular hall is 4 meters less than 3 times the breadth of the hall ( Given )

• Breadth of hall be b metres ( Given )

• Length of the hall ( To find )

• The hall is in rectangular shape ( Given )

Now, let's carry on,

➝ Length of hall = 3 × (b) - 4

➝ Length of hall = 3 × b - 4

➝ Length of hall = 3b - 4

Hence, 3b-4 m is the length of rectangular hall.