A tank contains 4000 liters (L) of a solution consisting of 234 kg of salt dissolved in water. Pure water is pumped into the tank at the rate of 9 L/s, and the mixturelong dashkept uniform by stirringlong dashis pumped out at the same rate. How long will it be until only 13 kg of salt remains in the tank?

t≅23.24 s

Step-by-step explanation:

There is a tank with 4000 liters of a solution with 234 kg of salt, this means that 4000 lt of solution contains 234 kg of salt and 3766 liters of water, so you must find the amount of water and the time used to shift said volume

234*100/4000 = 5.85%, this means 5.85 kg of salt in 100 Lt of solution, so

(4000 sol/234 kg salt)*13kg salt = 222.2 sol

that is, in order for 13 kg of salt to remain, 222.2 liters of solution must remain

, where 222.2sol-13kg salt = 209.2 Lt of water, with the rate of 9 Lt/s

we have 209.2Lt*s/9Lt ≅ 23.24 s

Note: tank filling speed is equal to tank drain rate

the answer to this question is yes

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc