Question

speed, distance, & time practice problems
directions: solve the following practice problems by using the correct formula. be sure to include the proper units in your answer.

1. a dragonfly traveled south 110 meters in 4 minutes. what was the speed of the dragonfly?

im solving for speed distance time
formula
show the numbers in the formula
answer
units

1. a car on a roller coaster traveled 250 m in 6 seconds. what was the speed of the roller coaster car?

im solving for speed distance time
formula
show the numbers in the formula
answer
units

1. a pilot flew a jet at 500 mi/hr for 5 hours. what distance did the jet fly?

im solving for speed distance time
formula
show the numbers in the formula
answer
units

1. a train travels at 60 mi/hr for 2.5 hours. what distance did the train travel?

im solving for speed distance time
formula
show the numbers in the formula
answer
units

Explanation:

Step1: Recall speed - distance - time formula

The formula for speed is $S=\frac{D}{T}$, where $S$ is speed, $D$ is distance and $T$ is time, for distance $D = S\times T$.

Step2: Solve problem 1

Given $D = 110$ meters and $T=4$ minutes. First convert 4 minutes to seconds, $T = 4\times60=240$ seconds. Then $S=\frac{D}{T}=\frac{110}{240}\approx0.46$ m/s.

Step3: Solve problem 2

Given $D = 250$ m and $T = 6$ s. Using $S=\frac{D}{T}$, we have $S=\frac{250}{6}\approx41.67$ m/s.

Step4: Solve problem 3

Given $S = 500$ mi/hr and $T = 5$ hours. Using $D=S\times T$, we get $D=500\times5 = 2500$ miles.

Step5: Solve problem 4

Given $S = 60$ mi/hr and $T = 2.5$ hours. Using $D=S\times T$, we have $D=60\times2.5=150$ miles.

Answer:

1.

• I'm solving for: Speed
• Formula: $S=\frac{D}{T}$
• Show the numbers in the formula: $S=\frac{110}{4\times60}$
• Answer: $\approx0.46$
• Units: m/s

2.

• I'm solving for: Speed
• Formula: $S=\frac{D}{T}$
• Show the numbers in the formula: $S=\frac{250}{6}$
• Answer: $\approx41.67$
• Units: m/s

3.

• I'm solving for: Distance
• Formula: $D = S\times T$
• Show the numbers in the formula: $D=500\times5$
• Answer: 2500
• Units: miles

4.

• I'm solving for: Distance
• Formula: $D = S\times T$
• Show the numbers in the formula: $D=60\times2.5$
• Answer: 150
• Units: miles