Reeta goes to office from home at a speed of 40 km/h. If she return to home from office at a speed of 60 km/h, then what is her average speed?
Show answer & explanation
Correct answer: C
Explanation
The Correct answer is Option 3 i.e. 48 km/h.
Let the distance between home and office be 240 km
Time = Distance/Speed
Time taken to go to office = 240/40 = 6 hr
Time taken to go to home = 240/60 = 4 hr
Average speed = Total distance/Total time
Average speed = 480/10 = 48 km/hr