Q: The time taken by a vehicle to go from one station to the other is 100 seconds. It is recorded with a stop watch having least count of 1 second. How many significant figures are there in t = 100 s?
(a) 2
(b) 1
(c) 3
(d) 4
Ans: (c)
In t= 100 s , the Number of significant figures is 3 , because during measurement every second is significant .