Anonymous
Anonymous asked in Science & MathematicsPhysics · 6 months ago

# average speed is 30km/h still have 10km to travel how long will it take?

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• MyRank
Lv 6
6 months ago

Given,

Average Speed (Vavg) = 30 km/hr

Total distance travelled = 10 km

Total time taken (t) =?

We know that,

Average Speed (Vavg) = (Total distance travelled)/ Total time taken

Average Speed (Vavg) = (10km)/ Total time taken

30 km/hr = (10km)/ Total time taken

Total time taken = 10km/ (30km/hr)

= ⅓ hr ≈ 1200 sec

∴ Total time taken (t) = 1200 sec.

• oubaas
Lv 7
6 months ago

10 km / (30 km/h) = 1/3 of hour = 20 min

• 6 months ago

Use the following equation.

d = v * t

10 = 30 * t

t =⅓

One hour is 3,600 seconds.

t = ⅓ * 3,600 = 1,200 seconds

OR

Let’s convert the velocity from km/h to m/s and the distance from kilometers to meters.

1 km = 1000 m

1 hour = 3600 s

1 km/h = 1000/3600 = 5/18 m/s

v = 30 * 5/18 = 8⅓ m/s

d = 10,000 meters

d = v * t

10,000 = 8⅓ * t

t = 10,000 ÷ 8⅓ = 1,200 seconds

I believe that the first method is easier than this method. Since both methods produce the same answer, this proves that it is correct. I hope this is helpful for you.

• 6 months ago

To travel 10Km at 30 Km/hour will take about 72,000 seconds or 20 minutes or 1/3 hour.

• 6 months ago

20' to travel 10km

• 6 months ago

on average, or statistically speaking, 20 minutes.

• 6 months ago

5 hours. There was an accident on the freeway and traffic is not moving. The exits are blocked and you just have to sit there.

If you mean that your average speed is going to continue at 30 km/hr for the future.

Then as speed = distance / time -> time = distance / speed

= 10/30 = 1/3 hour.

( and if you wanted it in minutes you can replace the hour with 60 minutes. 1/3 of 60 = 20 minutes)