SOLUTION: a train travels a certain journey and is supposed to arrive at midday.when its average speed is 40km/h,it arrivr at 1pm when its average speed is 48km/hr it arrives at 11am.what is
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Question 1118157: a train travels a certain journey and is supposed to arrive at midday.when its average speed is 40km/h,it arrivr at 1pm when its average speed is 48km/hr it arrives at 11am.what is the length of the journey?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
a train travels a certain journey and is supposed to arrive at midday.
when its average speed is 40km/h, it arrives at 1pm
when its average speed is 48km/hr it arrives at 11am.
what is the length of the journey?
:
let d = the length of the journey
The arrival times differ by 2 hrs
:
Write a time equation
40km/h time - 48km/h time = 2 hrs
- = 2
multiply equation by 240
240* - 240* = 2(240)
Cancel the denominators
6d - 5d = 480
d = 480 km is the distance
:
:
Check this, Find the actual time of each
480/40 = 12 hrs
480/48 = 10 hrs
-------------------
differs = 2 hrs
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