Answer:
Step-by-step explanation:
Since we need the ratio of drawing area to floor area to figure the actual floor area, it is convenient to answer the questions in reverse order.
The ratio of drawing area to actual area is ...
... ((1 cm)/(4 ft))² = (1 cm²)/(16 ft²)
____
Then the actual floor area is ...
... (16 ft²)/(1 cm²) = actual area/(49 cm²)
Multiplying by 49 cm² gives ...
... (16 ft²)*49/1 = actual area = 784 ft²
