Question

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

Answer 1

Answer:

5cm and 15cm

Step-by-step explanation:

$perimeter \: of \: rectangle = 2(l + b) \\ length = 3x \: \: \: \: breadth = x$

$2(3x + x) = 2(4x) = 40cm \\ 8x = 40cm \\ x = 40cm \div 8 = 5cm$

$x = 5cm \\ 3x = 3(5)cm = 15cm$

$5cm \: and \: 15cm \: are \: the \: answers.$

Answer 2

Hey mate here's your answer :

Answer:

Let the breadth of rectangle be x.

Length = 3x

Perimeter of rectangle = 2 × ( length + breadth )

Perimeter = 40 cm

40 cm = 2 × ( 3x + x )

40/2 cm = 4x

20 cm = 4x

20/4 = x

5 = x

x = 5

length = 3x

= 3×5

= 15 cm

breadth = 5 cm

Hope it helps you.

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