Correct Answer - Option 2 : 5 m
Given:
Speed of ball = 13 km/h
Hitting time = 3 s
Speed of person = 7 km/h
Formula Used:
Speed = Distance/Time
Concept Used:
If two objects are moving in the same direction with speeds S1 and S2,
Their relative speed is S1 – S2
Calculation:
Relative speed = 13 – 7 = 6 km/h
⇒ 6 × 5/18 = 5/3 m/s
Using the above Formula,
Distance = 5/3 × 3 = 5 m
∴ The person was standing 5 m away earlier.