A delivery van covers the first 100 km at 50 km/h, the next 150 km at 60 km/h, and the last 50 km at 40 km/h. What is the average speed for the entire journey (correct to two places of decimal)?
52.17 km/h
Average speed is total distance divided by total time.
Total distance: \(100 + 150 + 50 = 300\) km.
Time for each leg: \(\frac{100}{50} = 2\) h, \(\frac{150}{60} = 2.5\) h, \(\frac{50}{40} = 1.25\) h.
Total time: \(2 + 2.5 + 1.25 = 5.75\) h.
Average speed: \(\frac{300}{5.75} \approx 52.17\) km/h.
Hence, the average speed for the entire journey is 52.17 km/h.
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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.
A train runs at a speed of 28 kmph for 4 hours and 30 kmph for 5 hours and the remaining 40 kms in one hour. What is the average speed per hour?
Kapil travels for 4.5 hours at a speed of 50 km / h and 7.5 hours at a speed of 70 km / h. At the end of it, he finds that he covered only 6/7 of the total distance. At what average speed should he travel so that the remaining distance traveled in 5 hours?
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?
A scooter from P to Q travels at 40 km/h and from Q to P at 30 km/h. What is the average speed of the scooter?
