In a nuclear reactor the volumetric heat generation rate is changing axially as $q^{\text{'}\text{'}\text{'}}(z)=az(\frac{W}{m^3})$ where $a=1\mathrm{.}19{10}^8(\frac{W}{m^4})$ is a constant.

$\backslash$table$[[$Height of coolant channel,$3\mathrm{.}8m$