It is found that the volume of a cube is numerically equal to its surface area. Then the measure of its edge in meters is:

(a)4 (b)6 (c)8 (d)cannot be determined

• (b) 6
  if edge of cube = a
  volume of cube = a^3
  surface area = 6(a^2)
  then
  a^3 = 6(a^2)
  a = 6
• 14 years agoHelpfull: Yes(2) No(0)
• ans 6
  volume=a^3
  surface area=6(a^2)
  on equating a=6
• 14 years agoHelpfull: Yes(1) No(1)
• 6 as l^3 =6*l^2 or l=6
• 14 years agoHelpfull: Yes(1) No(1)
• Option b is right answer.
  
  volume of cube = a^3
  surface area = 6(a^2)
  
  given
  a^3 = 6(a^2)
  a^3 - 6(a^2) = 0
  (a^2) *(a - 6)= 0
  a=0 and a=6
  
  thus measure of its edge is 6 mtrs.
• 14 years agoHelpfull: Yes(1) No(0)