Answer: 29hours.
Step-by-step explanation:
Volume of a cylinder = πr²h, where π = a constant = 3.142, r = d/2 = 35/2ft because 2r = d and the length or depth = 6ft.
Now, substitute for the values in the formula above,
V = 3.142 x (35/2)² x 6
= 5,773.425ft³.
Since there are 7.5 gallons per ft³,
It implies that 5,773.425ft³
= 5,773.425 x 7.5 gallons
= 43,300.6875gallons.
Draining Rate = 25gallons per minute,
Therefore, 43,300.6875gallons
= (43,300.6875)
________
25
= 1,732.0275minutes
Convert to hours bearing in mind that ,
60minutes = 1hour
Therefore,
1,732.0275minutes = 1,732.0275/60
= 28.867125hrs.
= 28.87hours
To the nearest hour,
= 29hours.
