Question

The perimeter of a rectangle is 210 cm. If the breadth is 30 cm, find its length.
70 cm
75 cm
65 cm

Pls explain bcoz I can't understand.

Answer 1

Answer:

75cm

Step-by-step explanation:

Let the length be taken as 'x'

$\color{black}\boxed{\colorbox{saffron}{Perimeter-2(length+breadth) }}$

$210 = 2(x + 30) \\ \\ = 210 = 2x + 60 \\ \\ 210 - 60 = 2x \\ \\ 150 = 2x \\ \\ x = \frac{150}{2} \\ \\ x = 75$

So, Length =

75cm