LUO
1
33. Th
25. A train moves on a straight-line track. It covers
first half of the distance at a speed of 20km/hr and
the other half of the distance at a speed of
30km/hr. The average speed of the train is:
a) 25km/hr
6) 24km/hr
c) 28km/hr
d) 20√2 km/hr
km/hr
ishika7968:
do you know the correct answer ??
means I just have to cross check my answer with the correct option
48 km/hr
okay
ssorry 24 km per hr is wright
hmm
ur answer is???
Answers
Answered by
2
let the total distance=2x
1. time=distance/speed
=x/20
2. time=distance/speed
=x/30
total time=x/20+x/30
=5x/60
average speed=total distance/ total time
=2x/5x/60
=2x × 60/5x
=2×12
=24km/h
Answered by
1
Answer:
hope this helps you all ✌
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