Problems on Train - Part 1
PROBLEMS ON TRAIN Before, entering into the topic one must know the common relation which is S=D/T S - speed of the train in (km/hr) or (m/s) D - distance of the train or object in (km) or (m) T - time it takes in (hr) or (sec) CONVERSION: Km/hr to m/s multiply by 5/18 m/s to km/hr multiply by 18/5 what is this 5/18??? It is 1 km equals to 1000m & 1 hr equals to 3600secs So 1km/1hr = 1000m/3600secs on further simplifying 5/18 m/s. NOTE- always convert speed rather than time & distance . Some factors to be known before solving the problem based on this, the problem classified into several types… LENGTH OBJECTS - Platforms, bridges, tunnels, trains NO LENGTH OBJECTS - Tree, man, pole, post, car, bus. WHEN THE TRAIN CROSSES NO LENGTH OBJECTS IF, STANDING DIRECTION SPEED DISTANCE - Train speed S Train distance D IF, MOVING DIR...