
Let’s break down your question into two parts:
🔸 Part 1: “My watch gains 5 minutes every hour”
This tells us your watch runs fast — but this part doesn’t affect the movement of the second hand per minute. Because regardless of whether a clock gains or loses time, the second hand always moves at the same angular speed — it’s just running ahead of true time.
So now let’s answer the actual question:
🔸 Part 2: How many degrees does the second hand move in every minute?
🕒 A clock has 360 degrees in a full circle.
The second hand completes:
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1 full circle every 60 seconds
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So in 1 minute, the second hand makes 1 full revolution = 360°
✅ Final Answer:
The second hand moves 360 degrees in every minute.
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Length of the train = 280 meters
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Length of the tunnel = 220 meters
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Speed of the train = 60 km/h
We are to find the time taken to cross the tunnel.
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✅ Step 1: Total distance to be covered = length of train + length of tunnel
= 280 m + 220 m = 500 meters
✅ Step 2: Convert speed from km/h to m/s
1 km/h = 5⁄18 m/s
So,
60 km/h = 60 × 5⁄18 = 50⁄3 ≈ 16.67 m/s
✅ Step 3: Use the formula
Time = Distance ÷ Speed
= 500 ÷ (50⁄3) = 500 × 3⁄50 = 30 seconds
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✅ Final Answer: The train will take 30 seconds to cross the tunnel.