Water is passed through the plant cells in the root and the trunk to reach the leaves. Find out the diameter of the plant cell if water is to reach from 300mm underground water to a leaf at a height of Sm. Assume the cell diameter is the same throughout and the soil is saturated from 300mm under the surface. Given, the density of water is 1000kg/m3, the contact angle is 30 degrees and the surface tension is 250mN/m.