Correct option is A
Given:
Segment 1: Distance = 40 km, Speed = 60 km/hr
Segment 2: Distance = 50 km, Speed = 50 km/hr
Segment 3: Distance = 60 km, Speed = 40 km/hr
Formula Used:
Time =
Average Speed =
Solution:
Total Distance = 40 + 50 + 60 = 150 km
Time for Segment 1 = hours
Time for Segment 2 = = 1 hour
Time for Segment 3 = hours
Total Time =
Total Time = hours
Average Speed
Average Speed
Average Speed = 47.368... km/hr
Rounding off to one decimal place gives 47.4 km/hr.
Final Answer
So the correct answer is (a)