Respuesta :

chikafujiwara

Answer:

2400cm^2

Step-by-step explanation:

50 * 10 = 500

(40 * 30 / 2) * 2 = 1200

30 * 10 = 300

40 * 10 = 400

Now add them all together.

500 + 1200 + 300 + 400 = 2400

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