"A bus is moving with a speed of 30 km/hr ahead of a car with a speed of 50 km/hr.
Channel: Doubtnut
Date: 2020-04-05

"A
 bus is moving with a speed of 30 km/hr ahead of a car with a speed of 50
 km/hr. How many kilometres apart are they if it takes 15 minutes for the car to
 catch up with the bus? 
`\ k m`
b. `15\ k m`
c. `7. 5\ k m`
d. `12. 5\ k m`"