The time taken by a migratory bird to cover 120 km distance with tailwind is 5 hours less than the time taken by it to cover half of that distance against headwind. If the ratio of speed of the bird in still air and tailwind speed of the bird is 5 : 8, how much distance is covered by it against headwind in 5 hours?

In a 1 km race, A runs at a speed of 35 m/s. If A gives B a start of 50 m and beats him by 12 seconds, then the speed of B is:

The speed of a car is 20 m/s. How much distance (in km) will the car travel in 2.5 hours?

If Reena walks from her home at a speed of 3 km/h, she reaches a birthday party 20 minutes late. If she increases her speed to 4 km/h, she reaches 30 minutes early. What is the distance between her home and the party venue?