A train has to move 120 km by covering 40 km with a speed of 20km/hr.What should be the speed for remaining distance so that average speed for entire journey is 40km/hr?
Answers
Answered by
5
Answer:
Step-by-step explanation:
Let the speed be x
(20*40+x*80)/120=40
80(x+10)=40*120
x+10=60
x=50
Hence it should run with 50kmph for the rest of the distance
Anonymous:
No the answer is 80 km/hr
You can ask anyone my answer is correct
Plzzz if u r doin homework don't write 80 km/hr...it's completely wrong
Ohk sorry...my answer is completely wrong....don't write mine write the other one
80 kmph is definitely correct
Answered by
13
Answer:
80km/h
Step-by-step explanation:
let the speed for remaining distance be xkm/h
remai ning dist.= 80km
total journey avg speed = 40
distance = 120
time = 120/40 = 3hr
distance already traveled is 40 km witha speed of 20km/hr so the time is 40/20 = 2 hr
time left = 1 hr
distance left is 80 km
speed = 80/1 = 80km/hr
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