The speed of stream is 3 km/hr
<em><u>Solution:</u></em>
Given that girl is swimming downstream
To find: Speed of stream
In still water she can swim at 2km/h and the river is flowing with her
Speed in still water = 2 km/hr
She covered a distance of 12km in 2h 24 min
Distance = 12 km
time taken = 2h 24 min = 
Therefore,


<em><u>If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:
</u></em>
Speed downstream = (u + v) km/hr
5 km/hr = 2 km/hr + v
v = 5 - 2
v = 3 km\hr
Thus speed of stream is 3 km/hr
The landform separating the two areas is the Alps, which is a wide range of mountains in central Europe.
Answer The beginning date of the Zhou has long been debated. Traditionally, it has been given as 1122 bce, and that date has been successively revised as scholars have uncovered more archaeological evidence. The most recent findings have placed the outright start of the dynasty at 1046 bce. The dynasty ended in 256 bce.:The Warring States Period
The partition of the Jin state created seven major warring states. After a series of wars among these powerful states, King Zhao of Qin defeated King Nan of Zhou and conquered West Zhou in 256 BCE; his grandson, King Zhuangxiang of Qin, conquered East Zhou, bringing the Zhou Dynasty to an end.
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Explanation: