Respuesta :

TheStranger

Answer:

4 m by 12 m

Step-by-step explanation:

one side = x

other side = 3x

x(3x) = 48

3x² = 48

x² = 16

x = √16

x = 4

x = 4 m

3x = 3(4) = 12 m

the answer is 12 m!!