Water level

Between 9 PM and 6:36 AM, the water level in a swimming pool decreased by 6/35. Assuming that the water level decreased at a constant rate, how much did the water level drop each hour?

Correct answer:

r =  0.0119 in/h

Step-by-step explanation:

h=6/35=3560.1714 in t1=6:36=6 hr 36 min =6+6036=6.6 hr=6.6 t2=9:00=9 hr 00 min =9+6000=9 hr=9  t=(12t1)+t2=(126.6)+9=572=14.4 h  r=h/t=0.1714/14.4=0.0119 in/h

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