a train travel for 30 minutes with a velocity of 54km/h and then 120 minutes with a velocity of 72 km/h in the same direction . calculate avarage velocity
Share
a train travel for 30 minutes with a velocity of 54km/h and then 120 minutes with a velocity of 72 km/h in the same direction . calculate avarage velocity
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Verified answer
Answer:
here is your answer
Explanation:
please mark me a brainlist
Explanation:
Let
v1 = 54km/h
t1 = 30 minutes = 1/2 hr
v2 = 72 km/h
t2 = 120 minutes = 2 hrs
So, according to the data provided,
Distance traveled in first 30 minutes = v1 × t1 = [54 × (1/2)] km = 27 km
Distance travelled in next 120 minutes = v2 × t2 = [72 × 2] km = 144 km
Total distance travelled by the train = 27 km + 144 km = 171 km
Total time taken = 1/2 hr + 2 hrs = 5/2 hrs
Since, average velocity = Total displacement / Total time taken
average velocity = Total displacement / Total time taken
= 171/(5/2) km/h
= (171 × 2)/5 km/h
= 342/5 km/h
= 68.4 km/h
<v> = 68.4 km/h
Hence, the average velocity of the train is 68.4 km/h.