Speed, Density, and Time Problems

This video tutorial covers the concepts of speed, distance, time, density, mass, and volume. It explains the formulas for speed and density and introduces the triangle method for solving related problems. The video provides examples of calculating speed, time, and density, demonstrating how to apply these formulas in practical scenarios.

What is the formula for speed?

• Speed = Time x Distance

• Speed = Distance x Time

• Speed = Distance / Time

• Speed = Time / Distance

Which method is often used by those uncomfortable with algebra to solve speed and density problems?

• Graphical Method

• Triangle Method

• Geometric Method

• Numerical Method

If a train travels 205 miles in 3 hours and 15 minutes, what is its average speed in miles per hour?

• 62.3 mph

• 63.1 mph

• 60.5 mph

• 65.2 mph

How do you convert 3 hours and 15 minutes into a decimal hour format?

• 3.75 hours

• 3.5 hours

• 3.25 hours

• 3.15 hours

John drives 90 miles at an average speed of 55 mph. How long does it take her to reach her destination?

• 1 hour 38 minutes

• 1 hour 50 minutes

• 1 hour 30 minutes

• 1 hour 45 minutes

If John leaves at 10:00 AM and takes 98 minutes to reach work, what time does she arrive?

• 11:38 AM

• 11:30 AM

• 11:45 AM

• 11:50 AM

What is the formula for density?

• Density = Mass / Volume

• Density = Volume x Mass

• Density = Mass x Volume

• Density = Volume / Mass

Which plank of wood is suitable if it needs to have a density greater than 1.5 g/cm³?

• Plank C

• None of the above

• Plank B

• Plank A

If a material has a mass of 400 grams and a volume of 250 cm³, what is its density?

• 1.4 g/cm³

• 1.7 g/cm³

• 1.6 g/cm³

• 1.5 g/cm³

Which of the following is NOT a correct unit for density?

• g/m³

• g/cm³

• kg/m³

• m³/kg