Your teacher wasn't clear with this, but I'm assuming the distance from B to C is greater than half of AB. Otherwise, the bisection wouldn't be possible.
Assuming this is the case, drawing a circle centered at A with the same radius, will allow us to intersect the two circles at points D and E as shown below. Segment DE is the perpendicular bisector of AB. We can prove this through the use of congruent triangles. Segment DE cuts AB into two smaller equal pieces FA and FB, so FA = FB.
Your answer would be (D) because 8*8 is 64. Then you multiply 64 by 6 since their are 6 sides to cube, and 384 mm³ is what you would get. Hope this helps!
first you add the parentheses and the divide 62 by the sum of the parentheses, which is 6 creating the equation 62 ÷ 6. This equation results in 10.3333333 or 10 1/3