Water flows from tank A to tank B at the rate of 2 litres per minute.

[Jahn]

Water flows from tank A to tank B at the rate of 2 litres per minute. Initially tank A has 200 litres in it and tank B has 100 Litres in it. Water drains from tank B at 0.5 litres per minute.
After how many minutes are there equal volumes of water in the 2 tanks?

Write an equation and solve it.

 

[math_celebrity]

Water flows from tank A to tank B at the rate of 2 litres per minute. Initially tank A has 200 litres in it and tank B has 100 Litres in it. Water drains from tank B at 0.5 litres per minute.
After how many minutes are there equal volumes of water in the 2 tanks?

Write an equation and solve it.

Tank A: V = 200 - 2x
Tank B: V = 100 - 0.5x

Where x is the number of minutes passed.

Set them equal to each other
200 - 2x = 100 - 0.5x

Subtract 100 from each side:
100 - 2x = -0.5x

Add 2x to each side:
1.5x = 100

Divide each side of the equation by x:
x = 66.66666667