To solve this, we need to consider the additional distance the train needs to cover to pass the platform.

First, let’s find the speed of the train:

Speed = Distance/Time.

Speed = 240 m/24 s.

Speed = 10 m/s.

Now, the train needs to cover the length of the platform (650 m) plus its length (240 m) relative to the platform. So, the total distance to cover is 650 m + 240 m = 890 m.

Time = Distance/Speed.

Time = 890 m/10 m/s.

Time = 89 seconds.

So, it will take 89 seconds for the train to pass the platform.