How many poles will be covered by a train in 4 hours if the train is running at a speed of 45 km/hr, given that the poles on the railway track are 50 m apart and the train crosses a pole at the beginning of its journey.

Correct option is D

​Given:

Speed = $$45 \, \text{km/hr} = 45000 \, \text{m/hr}$$​​

Poles are 50 m apart.

Time = 4 hours

Formula Used:

​$$\text{Distance Covered} = \text{Speed} \times \text{Time}$$​​

$$\text{Number of Poles} = \frac{\text{Distance Covered}}{\text{Distance Between Poles}} + 1$$​​

Solution: 

Applying the formula: 

​$$\text{Distance Covered} = 45000 \times 4 = 180000 \, \text{m}$$​​

$$\text{Number of Poles} = \frac{180000}{50} + 1 = 3601$$ 

Thus, the number of poles covered by train in 4 hour is 3601