A train moving at a constant velocity of 54 kilometre per hour most East wards of 30 minutes then due to not with the same speed of 40 minutes what is the average velocity of the train during the run
Answers
Answered by
2
Answer:
distance covered due east =54 km/hr × 1/2
hour=27km
distance covered due north =54km/hr × 4/6hr =36 km
displacement is the hypotenuse between starting and initial point =√27^2+36^2=45 km
total time =70 mins or 7/6 hrs avg velocity
=total displaceent, time =45×6/7=38.4 km /hr
so, since avg velocity is 38.4 km/hr
Answered by
0
Answer:
Correct option is C)
Explanation:
Correct option is C)
We know that
According to question distance east west →speed×time
=54×
2
1
hr
=27 km
distance north →54×
60
40
hr
=
4
5
×
3
2
=36 km.
Net distance =
(36)
2
+(27)
2
=45 km
Avg. velocity =
total time
Total displacement
=
(30+40/60)
45
=
70/60
45
=
76
45×64
=38.4
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