Question

length of the rectangle is three times its breadth perimeter of the rectangle is 40 cm find its length
and width​

Answer 1

breadth = X

Length=3x

40= 2(3x+X)

40=8x

X=40/8=5

Length =3×5=15

breadth/width=5

Answer 2

Answer:

Let l and b be the length and breadth of rectangle

Given that, l=3b

We know that,

Perimeter of the rectangle =2×(l+b)

⇒40 cm=2×(3b+b)=2×4 b=8 b

⇒b=  

8

40

​

cm=5 cm

⇒l=3b=3×5 cm=15 cm.

Step-by-step explanation:

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