Time (h) 0 1 2 3 4 5 6 7 8
Distance (km) 0 73.5 150 222.5 302.5 375 461 523.5 601.5
How far would the car have travelled after 4.25 hours?
After how many hours would the car have travelled 1000 km?
2007-01-21 13:09:04 · 3 answers · asked by amanuel m 1 in Science & Mathematics ➔ Mathematics
Well, at 4.25 hours the car would have travelled 320.63 km
And you will reach 1000 miles in 13.3 hours.
I can't really give you an equation if that's what you need... I hope this at least helps!!!
If it helps at all, I just averaged everything.
2007-01-21 13:14:57 · answer #1 · answered by Tiff 5 · 0⤊ 0⤋
The car is travelling different distances in each hour.
Are we told that the speed remains constant during the hour? If so, question 1 is simple.
The car travels 72.5k in the 5th hour. In .25 hours, it would travel 18.125km. Therefore, at 4.25 hours it would have travelled 302.5 + 18.125 = 320.625km.
Are we to assume that the speed remains constant after the 8th hour? If so, question 2 is also simple.
The car travels 78k in the 8th hour. To travel the additional 398.5km to reach 1000km would therefore take 5 hours, 6 minutes and 32 seconds. Therefore, the total time to reach 1000km is 13 hours, 6 minutes and 32 seconds.
If the speed is actually varying with some timing and pattern that we are meant to discover (and which I have not discovered) then the answers will be different.
2007-01-21 13:29:51 · answer #2 · answered by Anonymous · 0⤊ 0⤋
one easy method is:
get the average velocity,
601.5/8=75.1875km/hour
thus, for 4.25 hour, it travelled = 4.25 h x 75.1875 km/h
= 319.546975 km
to travel 1000km, it takes = 1000 km / 75.1875 km/h
= 13.30008 hour
2007-01-21 13:23:14 · answer #3 · answered by joseph kuah 2 · 0⤊ 0⤋