Average speed of a boat

  • Thread starter Makaroon
  • Start date
  • #1
23
0

Homework Statement


A boat moves 15.0 km across a lake in 30.0 min. What was the average speed of the boat in kilometers per hour?


Homework Equations


average speed: d/t


The Attempt at a Solution


ok since it is asking kilometers per hour that is the part tha confuses me.
i mean i believe that it is 15.0 km/30.0
but it is asking for hour...
sooo that where i get lost.
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
3,097
5
That's what it did in 30 min.

How much would it do in an hour.
 
  • #3
23
0
oh so then i multiply that times 2?

or would i do 15.0/60?
 
  • #4
23
0
ok no..that doesn't make sense :S
 
  • #5
116
0
If it goes x km in thirty minutes and keeps the same speed, wouldn't it go the same distance in the next thirty minutes?
 
  • #6
23
0
ooh so then its the same..
 
  • #7
Nabeshin
Science Advisor
2,207
16
i mean i believe that it is 15.0 km/30.0
but it is asking for hour...
sooo that where i get lost.

Your 15km/30 is lacking one thing: Units on the 30. The 30 is in minutes, so this division would give you km/minute.
 
  • #8
23
0
hm, but it is asking for kilometers per hour.

gosh sorry i'm soo ugh for this.
 
  • #9
116
0
30 min is ½hour, right?

It goes 15km in ½hour - how much in 1 whole hour?
 
  • #10
23
0
oh so then it is 30km/h?
 
  • #11
116
0
Yep, that's it.
 
  • #12
23
0
wow! thank you so much!
i truly appreciate it!
 

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