Subject: mathqa
Question: the average speed of a car is 1 3 / 5 times the avg speed of a bike . a tractor covers 575 km in 23 hrs . how much distance will the car cover in 4 hrs if the speed of the bike is twice speed of the tractor ?
Option: 
A: 360 km
B: 320 km
C: 550 km
D: 400 km
Answer: B