A table fan rotating at a speed of 2400 rpm is switched OFF and the resulting variation of rpm with time is shown in the figure. The total number of revolution of the fan before it comes to rest is

Q: A table fan rotating at a speed of 2400 rpm is switched OFF and the resulting variation of rpm with time is shown in the figure. The total number of revolution of the fan before it comes to rest is

Numerical

(a) 420

(b) 280

(c) 190

(d) 380

Ans: (b)