The $690-kg$ load on the hydraulic lift is to be raised by pouring oil $(=840k\frac{g}{m^3})$ into a thin tube. Determine how high $\text{'}h\text{'}$ should be to begin to raise the weight. The larger size tube has a diameter of $3\mathrm{.}2$ m and the smaller size has a diameter $2\mathrm{.}2$ cm $.[10]$

Hint: Same concept as for problem #$2.$