In a boiler trial, \(1360 \mathrm{~kg}\) of coal were consumed in 24 hours. The mass of water evaporated was \(13600 \mathrm{~kg}\) and steam pressure was \(7.5 \mathrm{bar}\). The feed water temperature was \(35^{\circ} \mathrm{C}\) Calorific value of \(1 \mathrm{~kg}\) of coal is \(30,000 \mathrm{~kJ} / \mathrm{kg}\). Calculate the boiler efficiency and equivalent evaporation.