Volume and body diagonal

Calculate how much the volume and body diagonal of the cuboid decrease if we reduce each of its three edges a, b, c by 18%?

Result

p1 =  44.863 %
p2 =  18 %

Solution:

p=18 % q=1−p/100=1−18/100=4150=0.82 p1=100⋅ (1−q3)=100⋅ (1−0.823)=44.8632=44.863%p = 18 \ \% \ \\ q = 1-p/100 = 1-18/100 = \dfrac{ 41 }{ 50 } = 0.82 \ \\ p_{ 1 } = 100 \cdot \ (1- q^{ 3 }) = 100 \cdot \ (1- 0.82^{ 3 }) = 44.8632 = 44.863 \%
p2=p=18=18%p_{ 2 } = p = 18 = 18 \%

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