If x=y=2z and xyz=256 then what is the value of x?

(a)12 (b)8 (c)16 (d)6

• Given that x=y=z.
  so,x=y,
  x=2z,
  y=2z.
  given xyz=256
  =>(2z)*(2z)*z=256
  =>4z^3=256
  =>z=4
  then x=2z
  =2(4)
  =8
  so ans is b.
  
• 13 years agoHelpfull: Yes(4) No(1)
• xyz=(2z)*(2z)*z=256
  z=4
  so, x=8
  ans is b
• 13 years agoHelpfull: Yes(1) No(1)
• x=2z;y=2z so xyz=(2z)(2z)(z)=>4z3=256
  z=4
  x=2z=2*4=8
  so x=8
  
• 13 years agoHelpfull: Yes(1) No(1)