Cube edges

If the edge length of the cube increases by 50%, how does the volume of this cube increase?

Correct result:

p =  3.375

Solution:

q=1+50/100=32=1.5 V1=a3 V2=(1.5a)3=1.53 a3  p=V1/V2 p=1.53=278=3.375

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