Time to Climb

Time to Climb << refers to the time required to achieve a set altitude given a set Rate of Climb (RC) general equation ;; $t_{\text{climb}}={\int }_{h_1}^{h_2}\frac{dh}{RC}$ equation if given RC-max and RC @ h ;; $t_{\text{climb}}=\frac{h_{abs}}{R{C}_{max}}(\ln \frac{h_{abs}}{h_{abs-h}})$ equation if RC @ different h is given ;; $t_{\text{climb}}=\frac{dh}{dRC}\times \ln \frac{R{C}_{h_1}}{R{C}_{h_2}}$