Question

The perimeter of a rectangle is 210cm and its breadth is 40cm. The length of the rectangle is______cm​

Answer 1

Answer:

perimeter of a rectangle = 210cm

breadth ( B ) = 40cm

let l be the length

2( l + B ) = 210

2 ( l + 40 ) = 210

$l + 40 = \frac{210}{2} \\ l + 40 = 105 \\ l = 105 - 40 \\ l = 65cm \:$

I hope it will help you

Answer 2

Answer: 65 cm

Step-by-step explanation:

Perimeter = 210 cm

Breadth = 40 cm

Length =?

We know,

Perimeter of a rectangle = 2(l+b)

210 cm = 2(l+40)

210 ÷ 2 = l+40

105-40 = l

65 = l

L = 65 cm (answer)