2006-11-06 10:40:55 · 4 answers · asked by Brady S 1 in Cars & Transportation ➔ Commuting
the car is driving 80 km/hour
2006-11-06 10:44:50 · update #1
You said the speed limit is 80kph, you did not say what speed the car is moving at ! so I dunno !
2006-11-06 10:43:13 · answer #1 · answered by Latin Techie 7 · 0⤊ 0⤋
This is a relatively simple algebraic math question:
Set up your two comparisons... you are comparing distance and time (km and hours).
80 km in 1 hour is one comparison. The other is 12.9km is "x" hours. "x" is your unknown that you are trying to figure out.
80km / 1h = 12.9 km / "x" h .....cross mulitply your fractions
80km * "x" h = 1h * 12.9 km .....isolate for x by dividing both sides by 80km
"x" h = (1h * 12.9km) / 80 km .... pull out the calculator and punch in the numbers
"x" h = 0.16125 h
It will take approximately 0.16 hours to travel 12.9 km.
If you want to know how long 0.16 hours is you can convert it into minutes by multiplying it by 60 (because there are 60 minutes in 1 hour)
0.16 * 60 = 9.7 minutes.
Therefore, it will take approximately 9.7 minutes.
2006-11-06 18:49:31 · answer #2 · answered by imac_razy_fool 2 · 1⤊ 0⤋
around 9 minutes 40 seconds.
12.9 kms is 16.13% of 80 kms
16.13% of 60 minutes is 9.68 minutes
.68 of 60 seconds is 40.8 seconds
2006-11-06 18:47:46 · answer #3 · answered by ???///??? 3 · 0⤊ 0⤋
9.675 minutes
2006-11-06 18:49:52 · answer #4 · answered by moon420 2 · 0⤊ 0⤋