Question

speed, time, and distance worksheet
1 a. julia rides her bike 6 km in 1/2 hour. what is her average speed in kilometers per hour?
1 b. a taxi hurries 120 miles in 3 hours. what is its average speed in miles per hour?
2 a. a train travels with a constant speed of 78 miles per hour. how far can it travel in 4 hours?
2 b. an airplane flies 2000 km in 2 hours. what is its average speed in kilometers per hour?

Explanation:

Step1: Recall speed formula

$\text{Speed} = \frac{\text{Distance}}{\text{Time}}$

Step2: Solve 1a: Calculate Julia's speed

$\text{Speed} = \frac{6}{\frac{1}{2}} = 6 \times 2 = 12$ km/h

Step3: Solve 1b: Calculate taxi's speed

$\text{Speed} = \frac{120}{3} = 40$ mph

Step4: Recall distance formula

$\text{Distance} = \text{Speed} \times \text{Time}$

Step5: Solve 2a: Calculate train's distance

$\text{Distance} = 78 \times 4 = 312$ miles

Step6: Solve 2b: Calculate plane's speed

$\text{Speed} = \frac{2000}{2} = 1000$ km/h

Answer:

1 a. 12 kilometers per hour
1 b. 40 miles per hour
2 a. 312 miles
2 b. 1000 kilometers per hour