you gotta try this! !

There are three people named Ram, Alice and Monica. There's a 100km straight road - AB . All the three are at A . Ram, Alice and Monica start the journey at the same time. Ram and Alice go in Ram's car at a uniform speed of 25kmph and Monica chooses to walk at a uniform speed of 5kmph . Ram drops Alice somewhere on the road; from which Alice walks at a uniform speed of 5kmph towards B . After dropping Alice, Ram goes back to pick up Monica. He meets Monica somewhere on the road and they both make it to the end by car. Finally all the three finish the journey at the same time. Find the total time taken for this journey.(in hours)...... NOTE:The speed of the car throughout the journey is 25kmph and a person walking is 5kmph