Question

how long will it take a boy running at 3 km/hr to cover a distance of 600m ?

Hint ..Change 3 km/hr into m/s ​

Answer 1

Answer:

3km=1 hour

600m =?

600m convert onto km

600/1000

.6 km

.6/3

.2h   i hope you will get the ans

Step-by-step explanation:

Answer 2

Time and Distance

Speed of boy is 3km/hr.

Distance to be covered = 600m.

By using concept of speed, time and distance.

We use the formula ,

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

Here distance is in meter.

and speed is in km/hr.

So, changing speed in m/sec, we need to multiply it by  5/18.

$3km/hr = \frac{3\times 1000}{60\times60}m/s\\\\=3\times\frac{5}{18}m/s \\\\=\frac{5}{6}m/s$

So, time taken

$\frac{600 \ m}{(\frac{5}{6} \ m/ s )} \\\\=720\ sec$

So time taken for the boy to cover 600 m is 720 sec or 12minutes.