Train question doing my head in!
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Train question doing my head in!
Can't seem to get to the answer of 10:50
The qs is:
Station A is 40km from station B.
A train leaves from station A at 10:00 & travels at 30km/hour toward station B.
At what time will it pass a train travelling at the same speed from B to A, which left at 10:20?
TIA
Bob
The qs is:
Station A is 40km from station B.
A train leaves from station A at 10:00 & travels at 30km/hour toward station B.
At what time will it pass a train travelling at the same speed from B to A, which left at 10:20?
TIA
Bob
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Re: Train question doing my head in!
Well I might start by asking where train 1 has got to by the time train 2 starts out :Bob1892 wrote:Can't seem to get to the answer of 10:50
The qs is:
Station A is 40km from station B.
A train leaves from station A at 10:00 & travels at 30km/hour toward station B.
At what time will it pass a train travelling at the same speed from B to A, which left at 10:20?
TIA
Bob
@ 30km/hr it will have gone 10 km in 20 mins.
So the trains will now be 30km apart - consider this to be a new starting point
Both travelling at 30km/hr means they will reach the halfway point (15km) in 30 minutes
ie at 10.50
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Re: Train question doing my head in!
First train leaves at 10. By 10.20 will have gone 10km. At that point 30km apart heading towards each other at 30km an hour. They will meet after 15km. This would take 30 mins. 10.20 plus 30 mins is 10.50.
Ps. Hubbie did this,can't take credit!
Ps. Hubbie did this,can't take credit!
Re: Train question doing my head in!
thanks guys- I can now get a good nights sleep