1.

Udai travels half of his journey by train at the speed of 120 km/h and rest half by car at 80 km/h. What is the average speed ?

Answer»

SOLUTION :Average speed=2(XY)/(x+y)
where x and y are the SPEEDS.
Average `speed=2xx120xx80/(120+80)`=96 km/h


Discussion

No Comment Found