GRE Exam Numerical Ability Area and Volume

The length and breadth of a cuboid are increased by 10% each while the height is decreased by 10%. Which of the following statements is/are true?
A. The volume of the cuboid increases
B. The volume of the cuboid decreases
C. The volume decreases by 9%
D. The volume increases by 8%
E. The volume increases by 8.9%

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GRE Other Question
A watch shows the correct time at 12 noon. It loses 30 minutes every hour after that. Which of the following statements is true?
A. It shows 12:30 p.m. at 1 a.m.
B. It shows 12:30 p.m. at 1 p.m.
C. It shows 2 p.m. at 5 p.m.
D. It shows 2 p.m. at 4 p.m.
E. It shows 1 p.m. at 2 p.m A triangle has its vertices at A(0,1), B(5,2) and C(-7,-7). Which of the following statements is/are true?
A) AB>BC B) BC>AC C) Angle A > angle B D) Angle C > angle E) AB is the longest side