Q: A bicycle travelling at 20 km/hr crosses a bridge in 2 minutes. What is the bridge's length?
-
A
555.5 m
-
B
444.4 m
-
C
777.7 m
-
D
666.6 m
D
Answer:
D
Explanation:
Distance = speed * time
To convert the speed from km/hr to m/s, we use the conversion factor: 1 km/hr = 5/18 m/s
Speed in m/s = 20 km/hr * (5/18 m/s/km/hr) = 50/9 m/s
Time = 2 minutes = 2 * 60 seconds = 120 seconds
Distance = speed * time = (50/9 m/s) * 120 seconds = 6000/9 meters = 666.6666666666667 meters.
The length of the bridge is 666.6666666666667 meters
Related Topic:
Share Above MCQ