 
 <prompt> ```For every 100 additional people wey enter inside spaceship, e speed go reduce by half. If di speed of di spaceship with 200 people inside na 500km per hour, wetin e go be di speed in km/hr wen 400 people dey inside?``` <response>: ```For every addition of 100 people added the speed is halved so for the first 100 people added its speed is 1/2 * 500 km/hr = 250 km/hr.
For another addition of 100 people its speed is also halved, 1/2 * 250 km/hr = 125 km/hr. So for the total of 200 additional people, its speed is 125 km/hr

The answer will be 125.``` 