Question

A train covers a distance of 40 km at the speed of 30 km/h the next 33 km distance covers with a speed of 44 km/h and last 80 km with the speed of 64 km/h find the average speed of the train?

A 59.75 km/hr Correct Answer Incorrect Answer
B 41 km/hr Correct Answer Incorrect Answer
C 52 km/hr Correct Answer Incorrect Answer
D 45.9 km/hr Correct Answer Incorrect Answer

Solution

Since the train covers different distance with different speeds. So, Average speed = Total Distance/Total Time Total distance = 40 + 33 + 80 = 153 km Time1 = 40/30, Time2 = 33/44 & Time3 = 80/64 Total Time = 40/30 + 33/44 + 80/64 Therefore, Average Speed = 153/(40/30 + 33/44 + 80/64) = 45.9 km/hr

Practice Next
×
×