Question 643535
The time needed to fill a tank varies inversely as the square of the radius of the hose. If a hose of radius 3.5 cm takes 8 min to fill a tank, how long will it take using a hose of radius 2 cm.
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{{{t = k/r^2}}}
{{{k = r^2*t}}}
{{{3.5^2*8 = 2^2*t}}}
t = 12.25*2
t = 24.5 minutes