Water flows in a tank whose base is 250m x 100m through a pipe whose cross-section is 3dm by 2.5dm at the speed of 20 km per hour. In what time will the water level rise to 1.5 metres?



[ A ]    25 hours
[ B ]    4.5 hours
[ C ]    45 hours
[ D ]    2.5 hours right
Answer : Option D
Explanation :

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