calculate the 2.012*10²³ number of 0 atoms
Answers
Answer:
A 100 m train is moving towards the railway station with the speed of 50 m/s . The train is 1 km away from the railway station. The time taken by the train to cross the station is
20 s
22 s \green{\star}⋆
10s
11s
★ Solution :
We have total distance , speed of the train and we need to find the time taken to cross the station . So , Isn't it easy to calculate ? We can calculate it by using speed-distance formula .
Length of the train (L) = 100 m
Speed of the train (S) = 50 m/s \orange{\bigstar}★
Distance b/w train and station (d) = 1 km
= 1000 m
Time taken to cross the station (t) = ? s
Total distance to be traveled (D) = Length of the train + Distance b/w train & station
➠ D = L + d
➠ D = 100 + 1000
➠ D = 1100 m \bigstar★
We know that ,
:\implies \sf Speed = \dfrac{Distance}{Time}:⟹Speed=TimeDistance
:\implies \sf 50 = \dfrac{1100}{t}:⟹50=t1100
:\implies \sf t=\dfrac{1100}{50}:⟹t=501100
:\implies \sf t=\dfrac{110}{5}:⟹t=5110
:\implies \textsf{\textbf{t\ =\ 22\ s}}\ \; \green{\bigstar}:⟹t = 22 s ★
Time taken to cross the station is 22 s .
Option (2)