Question

13. A man runs at the speed of 10 Km/ hr. How much time will he take to cover 750 meters? Also express his speed in m/s.

Answer 1

distance = 750m=0.75km
speed=10km/hr
speed=distance /time
10=0. 75/time
time =0. 75/10
time=75/1000seconds
time = 0. 075 seconds
speed in km/hr is
=10km/hr
speed in m/s is
=10×1000m/60×60sec.
=10000m/3600sec.
=100m/36sec
=25m/9sec.

Answer 2

Answer : -

Given that,

Speed = 10 km/hr

Distance = 750 metres

To find,

Time = ?

Before reckoning speed, we've to convert the speed into it's SI unit which is m/s.

By this time, we aren't gonna to convert distance as it's already in it's SI unit, which is metre.

As we know,

1 km/hr = 0.278 m/s

.°. 10 km/hr = 2.78 m/s (approximately)

We know that,

Speed (v) = $\frac{Distance\:(s)}{Time\:(t)}$

So, time (t) = Distance (s) $\times$ speed (v)

Time (t) = 750 m $\times$ 2.78 m/s

Time (t) = 2,085 seconds.

$\huge{\boxed{\pink{Time=2,085\:s}}}$