well, ok this is the question: you bike from your house to school, cover in a distance of 3km in 15 min. what is your average speed in kilometers per hour?
well i got .2 or something, it might not help a lot because i don't know what is less than kilometers, im just an american who would usually use the old english system.
2007-01-15 19:27:42 · 10 answers · asked by Anonymous in Education & Reference ➔ Primary & Secondary Education
It is 12km per hour.
15 minutes is a quarter of an hour (60 minutes).
So all you do is times (multiply) the 15 minutes by 4 to get 60 (which is an hour). You do the same with the distance covered by the bike (3km multiplyed by 4 = 12km
Therefore, It is 12 km per hour.
1km=0.621 miles
Therefore: 12km=7.46miles per hour. (both of these answers are correct to 2 decimal places.)
I hope I've helped you.
2007-01-15 20:31:42 · answer #1 · answered by Anonymous · 0⤊ 0⤋
There are 4 (four 15 min. sections in an hour ,right) ? So if you do 3 Kilometers (or miles on anything else for that matter) In one of the sections and there are 4 sections, you multiply 3 (your speed) times 4 (sections in an hour) to get your answer of 12 kilometers per hour.
2007-01-16 03:52:37 · answer #2 · answered by brainavac 1 · 0⤊ 0⤋
It doesn't really matter that you are using kilometers, feet, inches, miles or any other unit you could think of as this problem basically just want you to figure out that 15 minutes is 1/4 of an hour.
So multiply both figures by 4 and you get 12 km per hour!
Good luck!
2007-01-16 03:35:35 · answer #3 · answered by Runner Runner 3 · 0⤊ 0⤋
the units of km is irrelevant. it could just as easily be miles.
One way to figure this out is to think how many units of 15 minutes are there in an hour... 4 of them. so if I rode the bike 4 times as long I get 12 km in an hour.
2007-01-16 03:40:26 · answer #4 · answered by expat 1 · 0⤊ 0⤋
easy if 3km = 15min
then * = 60min
formula is 60 x 3 / 15 = *
which is 12 by the way
2007-01-16 03:43:26 · answer #5 · answered by eddie mac 2 · 0⤊ 0⤋
it's 12. you have 15 minutes.... multiply the distance you get in that time, by 4...... 4 quarters in a whole.... gives you 12.
Don't confuse the metric system anymore that it already is....
2007-01-16 03:37:58 · answer #6 · answered by damond h 6 · 0⤊ 0⤋
12 km per hour
2007-01-16 03:33:42 · answer #7 · answered by Anonymous · 0⤊ 0⤋
12 kmh.
2007-01-16 03:33:08 · answer #8 · answered by Anonymous · 0⤊ 0⤋
5kph
http://www.sarcasticgazette.com
2007-01-16 03:31:56 · answer #9 · answered by Sarcastic Gazette 2 · 0⤊ 2⤋
i guess..0.75kph?
2007-01-16 03:39:32 · answer #10 · answered by bAdgIrL™ 4 · 0⤊ 2⤋