A train is booked to do the run between two places , 55km apart , in 1 hour 20 minutes . If it travels for the first 30 km at 36 km / hr , at what speed must it travel for the rest of the distance in order to complete the journey in time ?
Answers
Answered by
9
Answer:
50km/hr
Step-by-step explanation:
d=30km
s=36km/hr
t=d÷s
=30÷36
=5/6hr=50min
distance left=55-30=25
time left =1hr20 min = 60min+20min=80min=80-50=30min=1/2hr
therefore,s=d/t
=25/0.5=50km/hr
Answered by
2
Step-by-step explanation:
Train completes 30km in 1 hour
→→it has to complete rest 25 km in 20 minutes
speed in rest journey => distance by time
=>25/20/60
25 × 3 :- 75km....
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