If energy (E), velocity (v) and  time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be :

Let surface tension [s] =ExvyTzWe have [s] =MT−2E=ML2T−2,v=LT−1  and  T=T=ML2T−2xLT−1yTzM1L0T−2=MxL2x+yT-2x−y+zx = 12x + y = 0   y = -2-2x - y + z = -2⇒−2×1−−2+z=−2⇒z=−2Hence [s] = Ev−2T−2