Question 16
Alvin and Charles both walk from Town $Q$ to Town $M$ at a speed of 4.8 km/h and 5.4 km/h respectively. Bob cycles from Town $M$ to Town $Q$ at a speed of 10.8 km/h. If all three of them start at the same time, Alvin will meet Bob 5 minutes after Charles meets Bob. How many minutes will Bob take to travel from Town $M$ to Town $Q$?