The included angle of a V-grooved pulley is \(30^{\circ}\). The belt is \(20 \mathrm{~mm}\) deep and maximum width is \(20 \mathrm{~mm}\). The mass of belt is \(0.35 \mathrm{~kg}\) per metre length and maximum allowable stress is \(1.4 \mathrm{MPa}\). Determine the maximum power that can be transmitted if angle of lap is \(140^{\circ}\) and coefficient of friction is 0.15 .