Ram covers a distance of 100 km with a variable speed. For the first half of his journey, the speed was 20km/h and during rest the journey, his speed was 40 km /h.Calculate the average speed of Ram during his whole journey?
Answers
Answered by
9
Welcome students,
◆ Answer -
vavg = 26.67 km/h
● Explanation -
# Given -
s = 100 km
v1 = 20 km/h
v2 = 40 km/h
# Solution -
During first half of journey -
t1 = s1 / v1
t1 = 50 / 20
t1 = 2.5 s
During second half of journey -
t2 = s2 / v2
t2 = 50 / 40
t2 = 1.25 s
Average speed of Ram during whole journey is given by -
vavg = (s1 + s2) / (t1 + t2)
vavg = (50 + 50) / (2.5 + 1.25)
vavg = 100 / 3.75
vavg = 26.67 km/h
Therefore, average speed of Ram is 26.67 km/h.
Thanks ...
Answered by
0
Explanation:
distance = 100 KM
first speed = 20 km per hour
second speed =40 km per hour
half of the distance : 100/2 = 50
To find average speed
= Total distance travelled
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Total time taken
Attachments:
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