1) She walks 2700m. How much is that in kilometres?
i got 2.7km
2) She walks 1.5km in 18 minutes. What is her average speed in kilometres per hour?
i got 12 km/h
are those right?? if not how is it done
2007-04-11 04:23:38 · 7 answers · asked by star_1987_13 1 in Education & Reference ➔ Homework Help
Yeah, you got the first question right. The second would be 5km/h...
1.5km in 18mins = 1km in 12mins
5km in 60mins
2007-04-11 04:29:03 · answer #1 · answered by Chris 2 · 0⤊ 0⤋
Number 1 is certainly correct 1000m = 1km
Number 2:
1.5 km/18 min = x km/hr
Convert 18 min into hours (60min/hour=18 min/ x hr). So divide 18 by 60. That gives you 0.3
So...
1.5km/0.3hr
I'm sure that you can do that one. Good work.
2007-04-11 04:40:18 · answer #2 · answered by Heidi L 2 · 0⤊ 0⤋
1) Right.
2) Wrong.
Method:
1hr = 60min
(60min * 1.5km)/18min=5km/hr
[sidebar]
I did not convert 18min to hours since you end up with a decimal/fraction. That's tedious for me. Not to mention the limitations when typing it out on a keyboard. So i simply conveted 1hour to minutes, it is lot easier to solve that way. You should be able to understand easily as well.
2007-04-11 04:35:23 · answer #3 · answered by in 30mins 3 · 0⤊ 0⤋
Your second answer is wrong. It should be 5km/h
You need to convert your 18mins to hour. Which is 18/60= 0.3hr.
To find average speed, take 1.5km/0.3h and you'll get 5km/h
2007-04-11 04:33:36 · answer #4 · answered by Asia 4 · 0⤊ 0⤋
The answers above give you what you want so I'll just add don't tell yourself that you suck at math. Not everyone is a good computational person. If you give up on math you close off half the world to yourself. Find a friend who is good at math and work together. It is worth it.
Good luck.
2007-04-11 05:18:02 · answer #5 · answered by CanProf 7 · 0⤊ 0⤋
yes that's right.
2007-04-11 04:31:09 · answer #6 · answered by page starshiine.™ 4 · 0⤊ 0⤋
you did well....
2007-04-11 04:26:56 · answer #7 · answered by Jim G 7 · 0⤊ 0⤋