Question

word problem: differential equations

Answer 1

setup the differential equation

Answer 2

change in salt in tank = rate in - rate out

Answer 3

\(\large \frac{dS}{dt} = (\text{rate in }) - (\text{rate out}) \)

Answer 4

find in/out rates of salt and plugin

Answer 5

-5 L/min?

Answer 6

it looks like a chemical engg problem to me T^T

Answer 7

Hey what is the perpendicular cross section of a pyramid

Answer 8

is it a triangle

Answer 9

@ganeshie8

Answer 10

http://orion.math.iastate.edu/rymartin/RUcourses/RU152/hw4_ans.pdf

go thru the second question in that link ...

Answer 11

Start by giving a name to the variable that stands for the amount of salt in the tank (at time t)

Answer 12

You should figure out how much salt is entering the tank every minute.
The first stream has 0.05 kg per liter. In one minute, 5 liters of this flows in. How much salt is that ?

Answer 13

@ganeshie8 thank you! :D