Thread: Pipes Working Individually

ONE SMALL PIPE TAKES TWICE AS LONG TO FILL A TANK AS A LARGER PIPE DOES. IT TAKES THE TWO PIPES 40 MINUTES TO FILL THE TANK WHEN WORKING TOGETHER. HOW LONG WILL IT TAKE EACH PIPE INDIVIDUALLY TO FILL THE TANK?

Let x be the time taken to fill in the tank by the small pipe
Let y be the time taken to fill in the tank by the big pipe pipe

x = 2y ------------- Eqn 1
x + y = 40 --------- Eqn 2

Solve for x and y.

Originally Posted by tester85

Let x be the time taken to fill in the tank by the small pipe
Let y be the time taken to fill in the tank by the big pipe pipe

x = 2y ------------- Eqn 1
x + y = 40 --------- Eqn 2

Solve for x and y.

I would have never known that this question involves solving two equations in two uknown.