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Precipitation is any liquid or frozen water that forms in the atmosphere and falls back to the Earth. It comes in many forms, like rain, sleet, and snow. Along with evaporation and condensation, precipitation is one of the three major parts of the global water cycle
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Let the speed of train be x
Then increased speed of train be 2x
Then EQ.
Speed= Distance/ time
Speed for speed of train = 25 km/h
and next double speed of train= 50 km/h
Solve the above eq. by formula of speed then
Put the formula of average speed=double speed of train/speed of train
You will get answer and full marks in it. ;)
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