Question

A swimmingpool have the volume 1000 m3. With the time t = 0, the swimmingpool is empty. We fill in so much water into the swimmingpool with constant speed v = 2,4 m3 per minute. At the same time, it is leaking water out of the swimmingpool simultaneous and the speed is at every moment proportional with the volume of the water. The proportional constant is a = 3*10-3minute-1

a) make a differential equation as V(t) have to satisfy.

b) solve the solution with the method with integral factor.

c) find out when the swimmingpool is half full.   

A swimmingpool have the volume 1000 m². With the time t=0, the swimmingpool is empty. We fill in so much water into the swimm  

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Answer #1

c To find t = ? at vlt) = V 21000 = 500 m² 2 2 Vt) = 8x103 7X10 & 3x10 500 = 8x10² - 7x10 3 é - 3x10²t - 3x10t 7500 е. 7000 t

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