Answer:
18 ft
Step-by-step explanation:
Given:
Using the formula substitute the above values;
V = l • w • h
5,670 ft³ = 21 ft • w • 15 ft
5,670 ft³ = (315 ft²)w
Dividing both sides by the coefficient of w
w = 5,670 ft³ / 315 ft²
w = 18 ft
Therefore, the value of width simplifies to 18 ft