Answer:
120 units² (Answer C)
Explanation:
The area of a parallelogram of base b and height h is A = bh, and here
A = bh = 240 units².
Doubling the height would give us a new height of 2h, and taking a quarter of the original base (length) would give us a new base (length) of b/4.
240 units²
Solving A = bh = 240 units² for h yields -------------------
b
and then substituting this result for h in the new equation
A = (2h) · (b/4) yields:
240 units² 2 · (240 units²)
(2 · ----------------- ) · (b/4), or ------------------------- = 120 units² (Answer C)
b 4