Question

A polar bear migrate north during winter to hunt for its food on sea ice. The daily average temperature decreases 3°C for every 100 km traveled. At the start of the bear's journey, the temperature is 2"C. What is the temperature after 200 km of its journey ?

Answer 1

The temperature after 200 km of its journey is -4°C

Explanation:

To find the new temperature, first, you need to find how much the temperature decreases, and then subtract this temperature decrease to the initial temperature.

The temperature decreases 3°C for every 100 km travelled, then, after 200 km the temperature decreases 2*3 = 6 °C.

At the start of the bear's journey, the temperature was 2 °C, after 200 km the temperature is 2 - 6 = -4°C

Answer 2

The average temperature after 200 kilometers of journey is -4 °C.

Explanation:

The situation shows that change in average temperature is directly proportional to travelled distance:

`T = 2^(\circ)C - (3^(\circ)C)/(100\,km) \cdot (200\,km)`

`T = -4^(\circ)C`

The average temperature after 200 kilometers of journey is -4 °C.