Question

Speed=14500m/sec ,distance=1000km sand and time is to be find out .

Answer 1

time=distance/speed=1000000/14500=68.9ms^-1

Answer 2

distance=1000km = 1000×10^3m= 10 ^ 6 m
speed=14400m/sec
$speed = \frac{distance}{time}$
$time = \frac{distance}{speed} = \frac{ {10}^{6} }{14500} = 68.93sec$