From the information given, t α 1/u³ thus t=k/u³ where k is the constant of proportionality k=tu³ where u=5, t=0.0096 then k=5(0.0096)=0.048 hence t=0.048/u³ thus the value of u when t=0.15 will be: 0.15=0.048/u³ u³=0.048/0.15 u³=0.32 u=³√0.32 u=0.684
