The volume of liquid filled in a spherical storage tank of radius R is computed from height of liquid, h, in the outside tube (neglecting the volume of liquid in the outside tube) as V=π h² (3R - h)/3. The estimate of liquid height (in m) to store V = 30 m³ of water in R = 3 m tank, after performing ONE iteration of Secant method, using 1 m and 3 m as two initial guesses of liquid height is ______________ (rounded off to second decimal place).