A tank contains 70 kg of salt and 1000 L of water. Water containing 0.4kgL of salt enters the tank at the rate 16 Lmin. The solution is mixed and drains from the tank at the rate 4 Lmin. A(t) is the amount of salt in the tank at time t measured in kilograms.

Explanation:

A(t) is the amount of salt in the tank at time t, measured in kilograms.

A(0) = 70

rate in - rate out

=0.4* 16 - (A/1000)*4

=   kg/min

A(0) = 70

-ln (1600 - 70) = 0/250  + C

-7.33 =  C

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

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