Question 1139257
A swimming pool has to be drained for maintenance.
 The pool is shaped like a cylinder with a diameter of 7 m and a depth of 1.7 m. 
 Suppose water is pumped out of the pool at a rate of 11 m3 per hour.
 If the pool starts completely full, how many hours will it take to empty the pool?
:
Find the volume of the cylinder which, in this case, is the volume of the water.
Radius = 7/2 = 3.5 m
V = {{{3.14*3.5^2*1.7}}}
V = 65.3905 cu/m
Find how long it takes to pump 65.3905 cu/m with pump that pumps 11 cu/m per hr
{{{65.3905/11}}} = 5.94459 ~ 6 hrs