Here is an HTML code containing 10 puzzles with numerical problems on Density and Speed. Each problem includes a "Hint" and "Answer" button that reveals the respective hint or answer when clicked.
HTML Code:
Density and Speed Puzzles
Numerical Puzzles: Density and Speed
Click "Hint" or "Answer" to reveal them.
1. A block has a mass of 240 g and a volume of 80 cm³. Find its density.
Hint: Use the formula Density = Mass / Volume.
Answer: Density = 240 g / 80 cm³ = 3 g/cm³
2. A car travels 180 km in 3 hours. What is its speed?
Hint: Use the formula Speed = Distance / Time.
Answer: Speed = 180 km / 3 hours = 60 km/h
3. A liquid has a mass of 500 g and a volume of 250 mL. Find its density.
Hint: Density = Mass / Volume. Ensure the units are compatible.
Answer: Density = 500 g / 250 mL = 2 g/mL
4. A cyclist covers a distance of 150 km in 5 hours. Calculate the speed.
Hint: Speed = Distance / Time.
Answer: Speed = 150 km / 5 hours = 30 km/h
5. A rock weighs 2.4 kg and displaces 1.2 L of water. What is its density?
Hint: Density = Mass / Volume. Ensure the units are consistent.
Answer: Density = 2.4 kg / 1.2 L = 2 kg/L
6. A train travels 600 km in 8 hours. Find its average speed.
Hint: Average Speed = Total Distance / Total Time.
Answer: Speed = 600 km / 8 hours = 75 km/h
7. An object has a density of 5 g/cm³ and a volume of 10 cm³. Find its mass.
Hint: Mass = Density × Volume.
Answer: Mass = 5 g/cm³ × 10 cm³ = 50 g
8. A car moving at a speed of 80 km/h travels for 2.5 hours. What distance does it cover?
Hint: Distance = Speed × Time.
Answer: Distance = 80 km/h × 2.5 hours = 200 km
9. A ship has a mass of 10,000 kg and a volume of 5,000 m³. What is its density?
Hint: Density = Mass / Volume.
Answer: Density = 10,000 kg / 5,000 m³ = 2 kg/m³
10. A runner covers 10 km in 50 minutes. Find their speed in km/h.
How to Use:
1. Copy the code into an HTML file (e.g., density_speed_puzzles.html).
2. Open the file in a web browser.
3. Click the "Hint" or "Answer" buttons to reveal the hint or solution for each numerical problem.
You can modify the questions or add more as needed by duplicating the structure of each puzzle.
Hint: Convert minutes to hours and use Speed = Distance / Time.
Answer: Speed = 10 km / (50/60) hours = 12 km/h
