The correct option is (d) 31.3 KW

For explanation: Nmax = 2240 rpm

At 180 Nm = N = 1450 rpm

Lugging = 28 Nm

So, at 180 – 28 = 152 Nm, let speed be Nmin

GR = 11.5% = 0.115%

0.115 = \(\frac{[2(2240-Nmin)]}{2240+Nmin} \)

Nmin = 1966.40 rpm

P = 2πNτ = 2 * π * 1966.40 * 152 = 31.3 KW