Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

what's a good way to find out how long it would take to fill my rubber ducky with water so it can sink and rescue my ring? for simplicity sake, my ducky sinks when 100% full. an example of a kinda the same problem using a box being filled with water can be seen around the 9 min mark or so -- http://www.youtube.com/watch?v=NWUFjb8w9Ps

share|improve this question
1  
A good way to find out is with a stopwatch. Have you wandered onto this site by mistake? –  Gerry Myerson Nov 19 '12 at 8:16
1  
About 6:50 would be better –  Henry Nov 19 '12 at 8:16

1 Answer 1

up vote 1 down vote accepted

If the volume of your duck is $D$ and the rate at which water is added is a constant $r$ then presumably $\dfrac{D}{r}$. If $r$ varies over time then the solution to $\int_{s=0}^t r \,ds = D$.

share|improve this answer
    
great answer!!! but i don't if that works, or if or how you are measuring the weight of water, or if that's even a factor –  kittensatplay Feb 9 '13 at 20:51

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.