Respuesta :

mani82ebra

Answer:

(8.5+x)×2=24

8.5+x=12

x=3.5

bonathebrain

Answer:

Breadth = 3.5cm

Step-by-step explanation:

Perimeter = 2L + 2B

24cm = 2(8.5) + 2B

2B = 24 - 17

B = 7÷2

B = 3.5