Question

the breadth of a rectangle is 15 CM. its length is 3 times its breadth find the perimeter of the rectangle​

Answer 1

b= 45cm

perimeter= 2(l+b)

= 2( 45+15)

= 2×60

= 120cm is perimeter

Answer 2

$\huge{ \underline { \text{Given}}}$

• The breadth of the rectangle is 15cm
• Length is 3 times of the breadth.

$\huge { \underline{ \text{To \: find}}}$

• The perimeter of the rectangle.

$\huge{ \underline{ \underline{ \text{✿Solution}}}}$

Let us assume that,

❖the breadth of the rectangle is x

Therefore,

❖the length will be 3x = 3 × 15cm = 45cm

We know that,

$\boxed{ \sf{ \blue{ \large{perimeter \: of \: a \: rectangle = 2(lenght + breadth}}}}$

According to the question,

Perimeter of the rectangle =

$\sf{ \large{2(15cm + 45cm)}}$

$\sf{ \large{ = (2 \times 60)cm}}$

$\sf{ \large{ \orange{ = 120cm}}}$

$\underline{ \rm{ \green{Hence \: the \: perimeter \: of \: the \: rectangle \: is \: 120cm}}}$

❀Important formulas:-

$\sf{ \large{ \bold{✤Area \: of \: rectangle}} } = (length \times breadth )\: sq.units$

$\sf{ \large{ \bold{✤Perimeter \: of \: a \: square}}} = 4a \: \: \sf{ \boxed{ \blue{ a = length \: of \: the \: side}}}$

$\sf{ \large{ \bold{✤Area \: of \: a \: square}}} \: = {a}^{2}$

ʜᴏᴘᴇ ᴛʜɪs ʜᴇʟᴘs!!!