If x=y=2z and xyz=256 then what is the value of x? (a)12 (b)8 (c)16 (d)6

• xyz=256
  (x)(x)(x/2)=256......coz x=y=2z
  x^3=512
  x=8
• 12 years agoHelpfull: Yes(9) No(0)
• given xyz=256
  nd x=y=2z so sub 2z in place of x na y
  (2z)(2z)(z)=256
  z^3=64
  z=4
  then xy*4=256
  xy=64
  so x=8 nd y=8
• 12 years agoHelpfull: Yes(5) No(3)
• xyz=256 ----1
  put y=x in equation 1
  xxz=256 ----2
  multiply 2 on both side of equation 2
  2xxz=512----3
  put 2z=x in equation 3
  xxx=512
  x^3=512
  x=8
  ans:b:8
  
  
• 12 years agoHelpfull: Yes(3) No(2)
• let x=k;
  then y=k; z=k/2;
  as xyz=256;
  k^3/2=256;
  k^3=512;
  k=8;
  x=8
• 12 years agoHelpfull: Yes(1) No(2)
• xyz=256
  x*x*(x/2)=256
  so x=8
  
• 11 years agoHelpfull: Yes(1) No(1)
• 2z*2z*z=256 4z^3=256 z^3=256/4 z^3=64 z=8
• 11 years agoHelpfull: Yes(1) No(0)
• option B 8
  8*8*4=256
• 12 years agoHelpfull: Yes(0) No(2)
• x, y and 2z values are equal -> 8=8=(2*4)
  x*y*z = 8*8*4
  total= 256
  x=8
• 11 years agoHelpfull: Yes(0) No(0)
• given x=y=2z then xyz=256
  (2z)(2z)(z)=256
  4z^3=256
  z^3=64
  z=4
  then,x=y=2z....
  x=2(4)=8
  
• 8 years agoHelpfull: Yes(0) No(0)