A car covers a distance in 40 min with an average speed = 60 km/h = (60 x 1000)/60 m/min
In 1 min, the same distance can be cover with speed =(60 x 1000 x 40)/60 = 4000 m/min
In 25 min, the same distance can be cover with speed =4000/25 = 1600 m/min
= 1600/1000 x 60
= 16 x 6
= 96 km/h