Arithmetic Aptitudes › Time and Distance › Question #4702
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QA bicycle travelling at 20 km/hr crosses a bridge in 2 minutes. What is the bridge's length?

ID: #4702 Time and Distance 256 views
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#4702Q ID
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Time and DistanceTopic
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  • A 555.5 m ✔ ✖
  • B 444.4 m ✔ ✖
  • C 777.7 m ✔ ✖
  • D 666.6 m ✔ ✖
Correct Answer: Option 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
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