A girl walking at a speed of 9 km/h crosses a bridge in 45 minutes. Find the length of the bridge in metres.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 6750.
45 minutes = 45/60 hour = 0.75 hours
Length = 9 × 0.75 = 6.75 km = 6750 meters
Therefore, the length of the bridge is 6750 meters.