For this number, I think the scale is 5m for every 4 cm. Therefore, the 4 cm drawn in the plan is really equal to 5m and the 5 cm is equal to 6.25m. The actual area of the bedroom is determined by multiplying the real dimensions. That is,
actual area = (5m)(6.25m) = 31.25 m²
Thus, the answer is 31.25 m².
