What is the time taken to travel this distance. With workings please. Many thanks.
2007-05-19 23:42:35 · 12 answers · asked by paul g 1 in Science & Mathematics ➔ Mathematics
Either you use the formula:
speed = distance / time
4 = 0.5 / t
4t = 0.5
t = 0.5/4
t = 0.125 hours
t = 7.5 mins
OR
4000m => 1hour
500m => (1/4000) x 500 hour = 0.125 hr = 7.5 mins
2007-05-20 04:20:22 · answer #1 · answered by Kemmy 6 · 0⤊ 0⤋
Distance = 500 meters
Speed = 4 km/hour
Looking at the speed:
4km = 4000m
1hour = 60 mins
So the speed is 4000m/hour = 66.67m/s (4000/60)
You want to travel a distance of 500m so the time taken is
Time taken = Distance/speed
500 / 66.67 = 7.5 mins
2007-05-19 23:57:26 · answer #2 · answered by Anonymous · 0⤊ 0⤋
500 meters is 1/2 a kilometer.
4km is therefore 8 lots of 500 meters.
If you travel 4 km per hour, you travel 8 lots of 500 meters in the hour.
So the time taken to travel 500 meters is 1/8 of an hour.
60 minutes divided by 8 is 7 and a half minutes.
2007-05-19 23:55:20 · answer #3 · answered by turenneuk 2 · 1⤊ 0⤋
Its 7.5 minutes
If it takes 1 hour to travel 4km, then it must take half an hour to travel 2km, quarter of an hour (15 mins) to travel 1km and therefore 7.5 mins to travel half a km which is what 500metres is.
Did you want the time = distance divided by speed calculation instead? That would be 0.5 divided by 4 which would be 0.125 hours which equates to one eighth of an hour i.e. 7.5 minutes.
2007-05-19 23:56:18 · answer #4 · answered by Salvador 4 · 0⤊ 0⤋
4 km travelled in 1 hour
1/2 km travelled in 1 times 1/2 divided by 4 hours
= 1/8 hour
2007-05-20 00:43:09 · answer #5 · answered by rosie recipe 7 · 0⤊ 0⤋
Simply -- 500meters is 1/8 of 4km.(4000m) So it will take 1/8 of 1 hour (60 mins) 60/8 = 7.5 minutes.
2007-05-19 23:57:22 · answer #6 · answered by jayktee96 7 · 0⤊ 0⤋
we use the distance formula:
r = d/t where r=rate, d=distance, t=time.
r=4km/hr = 4000m/hr. (convert to have the same units)
d=500m
t=?
r=d/t
4000m/hr = 500m/t
t=0.125 hours or7.5 minutes or 450 seconds. :)
2007-05-19 23:52:51 · answer #7 · answered by kpgkn29 2 · 0⤊ 1⤋
Put on some running shoes and find out.
But choose a more respectiable speed.
2007-05-20 05:33:33 · answer #8 · answered by Anonymous · 0⤊ 0⤋
4 km/h is roughly 1 m/s (3.6 km/h = 1 m/s) so it would take approximately 500s, or about 8 minutes.
That's not exact, but it's a good example of estimation in action.
2007-05-19 23:51:25 · answer #9 · answered by poorcocoboiboi 6 · 1⤊ 2⤋
s = d / t
So rearrange: t = d / s
Oh yeah, remember to convert 500m into km so as to get your answer of time in hours. You might then have to convert hours into minutes I suppose.
The other thing you could do is convert your speed into meters per minute or meters per second and then do the calculation.
2007-05-19 23:44:51 · answer #10 · answered by Orinoco 7 · 0⤊ 2⤋