Respuesta :

jrodt
This is so so so so easy. Simply subtract the length times 2 from the perimeter and divide by 2.

Your answer is 7 cm
devishri1977

Answer:

width = 7 cm

Step-by-step explanation:

length = 35 cm

Perimeter = 84 cm

2 * ( l + b) = 84

2 * ( 35 +b ) = 84

       35 +b  = 84 / 2

        35 + b = 42

                 b = 42 -35

                   b = 7

width = 7 cm