A person walking at a speed of 7.2 km/h and crosses a bridge in 25 minutes. Find the length of the bridge (in metres)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 3000
Given:
A person walking at a speed of 7.2 km/h and crosses a bridge in 25 minutes
Formula used:
Speed = Distance/time ---- (1)
Calculations:
7.2 km/h in m/s = 7.2 × (5/18) = 2 m/s
25 minutes in seconds = 25 × 60
Length of the bridge = 2 × 25 × 60 = 3000 meters