Respuesta :

Dani882

Answer:

it's length is 15cm

Step-by-step explanation:

let a represent the length

a × 10 ×12 = 1800

a×120= 1800

a = 1800÷12

a=15cm

1800=L×h×b

1800=L×10×12

1800=120L

L=1800/120

L=15cm ans..