With an average speed of 50 km/hr, a train reaches its destination in time. If it goes with an average speed of 40 km/hr, it is late by 24 min. The total journey is :
A. 30 km
B. 40 km
C. 70 km
D. 80 km
Answer: Option D
Solution(By Examveda Team)
Difference between timings = 24 min = $$\frac{24}{60}$$ hr = $$\frac{2}{5}$$ hrLet the length of the journey be x km
Then,
$$\eqalign{ & \Leftrightarrow \frac{x}{{40}} - \frac{x}{{50}} = \frac{2}{5} \cr & \Leftrightarrow \frac{x}{{200}} = \frac{2}{5} \cr & \Leftrightarrow x = \left( {\frac{2}{5} \times 200} \right) \cr & \Leftrightarrow x = 80{\text{ km}} \cr} $$
Related Questions on Speed Time and Distance
A. 48 min.
B. 60 min.
C. 42 min.
D. 62 min.
E. 66 min.
A. 262.4 km
B. 260 km
C. 283.33 km
D. 275 km
E. None of these
A. 4 hours
B. 4 hours 30 min.
C. 4 hours 45 min.
D. 5 hours
Join The Discussion