Question

find the circumference of

Answer 1

Hey...
$circumference = perimeter \\ perimeter \: of \: rec.= 2 \times( l + b) \\lenght=21cm , breadth=7 cm, = 2 \times (7 + 21)cm \\ = 2 \times 28 \\ = 65cm$

Hope it will help.......

Answer 2

Answer:

Step-by-step explanation:

Perimeter=2(l+b)

=2×28

=56