Mithila covers 50 km by bus in 90 minutes. After deboarding the bus, she takes rest for 15 minutes and covers another 30 km by a taxi in 35 minutes. Find the average speed (in km/h) for the whole journey.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. .
Total Distance = 50 km + 30 km = 80 km
Time taken by bus = 90 minutes = 90/60 = 1.5 hours
Rest time = 15 minutes = 15/60 = 0.25 hours
Time taken by taxi = 35 minutes = 35/60 = 0.5833 hours
Total Time = 1.5 hours + 0.25 hours + 0.5833 hours = 2.3333 hours
Average Speed = Total Distance/Total Time = 80km/2.3333hours =