📅 2026-06-27

Daily Math Challenge

📚 Science ⭐ Medium 🎓 Grade 3-5
A light bulb uses 60 watts. If it runs 4 hours per day, how many watt-hours per day?
Answer
240 watt-hours

📝 Step-by-Step Solution

1
Power: 60 watts
2
Time: 4 hours
3
Energy: 60 × 4 = 240 watt-hours
💡 Helpful Hints
• Multiply power by time