Assessments
Question 57
There are 4 people who have to cross a stretch of 300 km. They normally run at a speed of 10 kmph. One of them has a bike that travels at 50 kmph. The bike first takes one person on and crosses the stretch while the other two keep running. The driver returns without wasting time and picks up another person along the way, drives him across the stretch, and does the same for the last person. How long does this whole process take?