Rohit travels 30 km at 60 km/hr, the next 40 km at 80 km/hr and the last 30 km at 30 km/hr. What is the average speed for the entire journey?
50 km/hr
Time for the first 30 km = \(\frac{30}{60} = \frac{1}{2}\) h.
Time for the next 40 km = \(\frac{40}{80} = \frac{1}{2}\) h.
Time for the last 30 km = \(\frac{30}{30} = 1\) h.
Total distance = 100 km and total time = 2 h.
Average speed = \(\frac{100}{2} = 50\) km/hr.
Hence, the answer is 50 km/hr.
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Important Questions from Average Speed
A person covers a certain distance at the speed of 60 kmph and returns to the starting point at a speed of 40 kmph . Find the average speed (in km/hour) of the person for the whole journey.
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A car has to cover 125 kms in 5 hours. What will be the average speed of the car if it has covered 90 kms in the first 3 hours?
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