Question

. If you run a half marathon (21 km) in 2 hours 6 minutes, how much time
does it take you to run one kilometer?

Answer 1

Answer:

4h 12min

please mark as brainliest

Answer 2

The time taken to run one kilometer is 0.1 hour or 6 minutes.

Given:

I run a half marathon (21 km) in 2 hours and 6 minutes.

To Find:

The time taken to run is one kilometer.

Solution:

To find the time taken to run is one kilometer we will follow the following steps:

As we know,

The relation between speed, distance, and time is given by:

$speed \: = \frac{distance}{time}$

The unit of speed in km/h or m/s.

Now,

According to the question:

Distance = 21km

Time = 2 hours + 30 minutes =

$2h + \frac{6}{60}h = 2 + 0.1 = 2.1h$

(1 hour = 60 minutes)

Now,

In putting values we get,

$speed = \frac{21}{2.1} = 10km {h}^{ - 1}$

Speed is 10km/h which means it travels 10 km in 1 hour.

So,

Time is taken to run 1 km =

$\frac{1}{10} = 0.1h = 0.1 \times 60 = 6 \: minutes$

(1 hour = 60 minutes)

Henceforth, The time taken to run one kilometer is 0.1 hour or 6 minutes.

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