A car moves with the speed of 40 kilometre per hour for half an hour 30 kilometre per hour for 1 hour and 50 kilometre per hour for two hour . Calculate the average speed of the car
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@ᴘʀᴀᴠᴇᴇ14
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Speed = 30km/h
time = 1/2h
distance = 30 * 1/2 = 15km
speed = 25km/h
t = 1h
distance = 25 * 1 = 25km
speed = 40km/h
t = 2h
distance = 40 * 2 = 80km
total distance = 15 + 25 + 80 = 120km
total time = 3.5h
avg speed = 120/3.5 = 34.29km/h(approx)
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