1. No the answer is incorrect. the answer would be 8 times as big. Here is the proof. Allow all the sides of the box to be x and the larger box to be 2x
V = s^3
Volume smaller box = x^3
Volume of larger box = (2x)^3 = 2x * 2x * 2x = 8x^3
2)
V= 968 = 11 * 11 * h
968 = 121h
h = 8 cm