2007-09-06 21:18:06 · 14 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
t = 1 hour 40 min = 1 2/3 h = 5 / 3 h
speed = 80 / (5/3) mph
speed = 240 / 5 mph
speed = 48 mph
2007-09-10 19:41:43 · answer #1 · answered by Como 7 · 0⤊ 0⤋
The time between 12:43 and 14:23 is 100 minutes or 1 hour and 40 minutes or 1 2/3 hours or 5/3 hours.
speed = distance/time = 80/5/3 = 80 * 3/5 = 48 miles/hr.
2007-09-06 21:29:54 · answer #2 · answered by Christine P 5 · 0⤊ 1⤋
You have to use the formula, Speed equals Distance divided by Time.
S = D (divided by )
T
So, Speed (S) is the variable.
D = 80
T= the difference between 12:43 and 14:23 which is an hour and 40 min.
Then, divide the distance by the time.
You should get a number near 57.......
Round up, and , your answer is
ABOUT 60 MILES/HR
2007-09-06 21:36:02 · answer #3 · answered by dazed and confused 2 · 0⤊ 1⤋
Ave speed = total distance (miles) / total time (h)
80/ (100/60) = 47.9m/h
2007-09-07 01:31:06 · answer #4 · answered by Aryan K 2 · 0⤊ 0⤋
Percy and Aryon K have the right formula. However if they had worked it out rather than used a calculator they would have got the correct answer of 48mph! Calculators are not always the answer to calculation!
2007-09-09 09:01:04 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Ans=28.57143miles/hr.
2007-09-06 23:05:47 · answer #6 · answered by Sasi Kumar 4 · 0⤊ 0⤋
14.23 -- 12.43 = 1 hr 40 min = 5/3 hr
speed = distance/time
= 80 miles/(5/3 hrs)
= 48 miles/hour
2007-09-06 21:41:13 · answer #7 · answered by sv 7 · 0⤊ 1⤋
Ave speed = total distance (miles) / total time (h)
80/ (100/60) = 47.9m/h
2007-09-06 21:27:22 · answer #8 · answered by Me 3 · 0⤊ 1⤋
60mph
my answer is correct, because i take in account certain factors
1 - Leaves on the track
2 - Delays
3 - Stopping at stations
4 - Changing of the driver
5 - Restricted speed zones
6 - Removal of old sofa from rail lines
2007-09-06 21:23:42 · answer #9 · answered by Anonymous · 0⤊ 1⤋
40 mins covers 80 miles
In 1 min he covers 2 miles
In 60 mins he will cover 120mph
2007-09-06 21:24:32 · answer #10 · answered by fosyfos 4 · 0⤊ 2⤋