(30 km) x (1 minute / 0.75 km)
= (30 x 1 / 0.75) (km/minute)
= 40 minutes .
The math is correct, but I wonder about the real world.
I don't know much about competitive biking, but you've got
this dude pumping along at almost 25 mph for 40 minutes
solid. Is this realistic ?