What is the Average Speed of a Boat Across a Lake?

Click For Summary

Homework Help Overview

The discussion revolves around calculating the average speed of a boat that travels 15.0 km across a lake in 30.0 minutes, specifically converting this speed into kilometers per hour.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore how to convert the distance and time into the correct units for average speed. There are attempts to clarify the relationship between distance traveled in a given time and the conversion to an hourly rate.

Discussion Status

Participants are actively engaging with the problem, questioning the conversion of minutes to hours and discussing the implications of maintaining a constant speed. Some guidance has been offered regarding unit conversion, but no consensus has been reached on the final calculation.

Contextual Notes

There is some confusion regarding the conversion of time from minutes to hours, and participants are addressing the need for clarity on how to express speed in the desired units.

Makaroon
Messages
23
Reaction score
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.
 
Physics news on Phys.org
That's what it did in 30 min.

How much would it do in an hour.
 
oh so then i multiply that times 2?

or would i do 15.0/60?
 
ok no..that doesn't make sense :S
 
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?
 
ooh so then its the same..
 
Makaroon said:
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.
 
hm, but it is asking for kilometers per hour.

gosh sorry I'm soo ugh for this.
 
30 min is ½hour, right?

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

Similar threads

  • · Replies 9 ·
Replies
9
Views
1K
Replies
20
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 6 ·
Replies
6
Views
4K
Replies
1
Views
3K
Replies
1
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
Replies
1
Views
2K
Replies
5
Views
5K
  • · Replies 7 ·
Replies
7
Views
2K