This is a simple mathematics calculation involved puzzle. Give a try.
Once I wanted to meet my friend who lives nearby my town; Halfway between our town there is a famous Coffee Shop and our appointment is fixed there. Both of us were riding at the speed of 6 KMPH. Distance between our Houses is 36 KM. My friend had a pet carrier pigeon and it starts flying the instant we both start our travelling. The pigeon flies back and forth at the speed of 18KMPH between us until we met in the Coffee Shop. Assume that the pigeon can go from 0 to 18 kmph instantaneously, plus also turn around instantaneously without resting.
How many miles does the pigeon travel?