If a train travels at 60 km / h for the first 40 minutes and 90 km / h for the next 20 minutes, what is the average speed of the train?
Answers
Answered by
0
Answer:
How to calculate average speed. Speed is distance divided by time. Simply put, if you drove 60 kilometres for one hour, it would look like this: Speed = distance (60 km) / time (1 hour) = 60km/h.
Explanation:
To be honest im not sure i hope this helps
Answered by
0
Answer:
average speed of train is 53.3 km/hr
Explanation:
train has a speed of 60km/h for the first 40 minutes,
t₁ = 40 minutes
= of an hour
v₁ = 60km/h
Distance covered by the train, d₁ = v₁t₁
d₁ = 60 x
= 40 km
for the next 20 minutes, train has the speed of 90km/h
v₂ = 40km/h
t₂ = of an hour
d₂ = v₂t₂
= 40 x
= 13.3 km
Total distance , d = d₁ + d₂
d = 40 km + 13.3 km
d = 53.3 km
Total time, t = t₁ + t₂
t = 40 mins + 20 mins
t = 60 mins = 1 hour
Average speed, V avg =
=
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