Question: The average speed of a car is $ 1\frac{4}{5} $ times the average speed of a bus. A tractor covers 575 km in 23 h. How much distance will the car cover in 4 h if the speed of the bus is twice speed of the tractor?
Options:
A) 340 km
B) 480 km
C) 360 km
D) 450 km
E) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
- Average speed of tractor $ =\frac{575}{23}km/h $
$ \therefore $ Speed of bus $ =2\times \frac{575}{23} $
$ \therefore $ Average speed of car $ =\frac{9}{5}\times \frac{2\times 575}{23}=90km/h $
$ \Rightarrow $ Distance covered in $ 4h=90\times 4=360km $