exam Maths Puzzle Numerical Ability

I am given the volume formula (1/2x^)*height of keep and im given the following.

Central Keep: L=149 w=96 h=40

Pentagon Tower
Tower: side length=20 height=65

Pentagon Cut

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exam Other Question
2^(x-1)=64 In a triangle, one angle is three times the measure of the second angle. The
third angle is twice the measure of the second angle. What is the measure of
each angle?

i do not understand this.