Amazon 60% off is distance by bus at the speed of 40 kilometre per hour and next article distance by the auto at the speed of 20 metre per hour and the remaining distance by the circle at the speed of 10 kilometre per hour find the average speed of the journey
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First two answers are not correct - for they do not account for the differing time spent at each speed.
1st leg of the trip - 10km÷60km/hr = 1/6 hr = 10 minutes
2nd leg of the trip - 10km÷40km/hr - 1/4 hr = 15 minutes
total trip - 20km in 25 minutes - speed is 20km*60min/hr÷25min = 48km/hr
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