Based on the given question above, the correct answer would be the fourth option. The <span>circumstance that the cross section can be a non-rectangular parallelogram is that, </span><span>when the plane makes an acute angle to the base and intersects three vertical faces. Hope this answers the question. </span>
I am not sure if I am correct. I think that the angles did not help to solve the problem, ( it makes an obtuse angle) and the unit rate is 421 mph and 384 mph.
2*421+384*2= 1610 miles or 2 (421+384)= 1610 miles