The table shows the times it took different animals to cover various distances.

MOTION OF ANIMALS
Animals Distance (km) Time (h)
Gray fox 73 1.05
Gazelle 68 0.85
Rabbit 70 1.25
Cheetah 85 0.75
Giraffe 60 1.15
Antelope 93 0.95


Which animal's speed is the greatest?

a
rabbit
b
gray fox
c
cheetah
d
gazelle

1 answer

To determine which animal's speed is the greatest, we need to calculate the speed of each animal using the formula:

\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]

Let's calculate the speed for each animal:

  1. Gray Fox: \[ \text{Speed} = \frac{73 \text{ km}}{1.05 \text{ h}} \approx 69.52 \text{ km/h} \]

  2. Gazelle: \[ \text{Speed} = \frac{68 \text{ km}}{0.85 \text{ h}} \approx 80 \text{ km/h} \]

  3. Rabbit: \[ \text{Speed} = \frac{70 \text{ km}}{1.25 \text{ h}} = 56 \text{ km/h} \]

  4. Cheetah: \[ \text{Speed} = \frac{85 \text{ km}}{0.75 \text{ h}} \approx 113.33 \text{ km/h} \]

  5. Giraffe: \[ \text{Speed} = \frac{60 \text{ km}}{1.15 \text{ h}} \approx 52.17 \text{ km/h} \]

  6. Antelope: \[ \text{Speed} = \frac{93 \text{ km}}{0.95 \text{ h}} \approx 97.89 \text{ km/h} \]

Now comparing all the speeds:

  • Gray Fox: 69.52 km/h
  • Gazelle: 80 km/h
  • Rabbit: 56 km/h
  • Cheetah: 113.33 km/h
  • Giraffe: 52.17 km/h
  • Antelope: 97.89 km/h

The greatest speed is that of the Cheetah at approximately 113.33 km/h.

The answer is: c) cheetah.

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