Answer:
t = 1400 s
Step-by-step explanation:
Given that,
Distance covered, d = 350 km = 350000 m
Speed of the object, v = 25 m/s
We need to find the time it takes to do that. Let the time is t. The formula for the speed of an object is given by :
v = d/t
i.e.

Putting all the values,

So, the time taken by it is 1400 seconds.