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1. A train 800 meters long is running at a speed of 78 km/hr . If it crosses a tunnel in 1 minute, then the length of the tunnel ( in meters ) is :
- A. 360
- B. 360
- C. 360
- D. 360
Answer: Option B
Explanation:
78 km/hr = (78 × 1000) / 60 m/min = 1300 m/min
In 1 minute it travels 1300 m/min
1300 = 800 + length of tunnel
length of tunnel = 1300 - 800 = 500 merer.
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