3. A train covers first half of the distance between two stations at a speed of 50 km/h and the other
half with 70 km/h. Then its average speed in km/h is
(1 Point)
A=50
B=48
C=58.3
D=57
Answers
Answered by
2
Answer:
58.3 is the right answer.
Answered by
1
Answer:
B=48
Explanation:
Let total distance = d
t1 = d2/40
= d/80
and t2 = d2/60
= d/120
Total time = t
= t1+t2
Average speed = d/t
= d/t1+t2
= d/d/80+d/120
= 80×120/80+120
= 48 km/hr is the answer.
Hope this helps you!!
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