An insect is at a corner of cubical room of side ‘l’. It can move with a constant speed of ‘v,’ then the  time taken to reach the farthest corner of cube is

Let on insect is at corner ‘A’ the farthest corner is EThen the displacement of insect is AE  AE=AH2+HE2 AE=2l2+l2 AE=3lTime taken is tvelocity=displacementtime time t=AEVelocity of insect ⇒time taken by insect =3lV