Correct option is B
Given:
- Length of the car = 3 m
- Length of the truck = 4 m
- Speed of the car = 7 m/s
- Truck is at rest
Formula Used:
Time taken to pass = Total distance / Speed
Total distance = Length of car + Length of truck
Solution:
Total distance = 3 + 4 = 7 m
Speed = 7 m/s
Time = 7 / 7 = 1 second
Correct Option: (B) 1 s