exam
Maths Puzzle
Numerical Ability
a water tank can be filled in 20 hours by an inlet pipe and emptied in 25 hours by an outlet pipe. how long will it take to fill the tank if both pipes are left open?
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exam Other Question
Given 3x^2+(k+2)x=-3, determine the value(s) of k so that the equation has real and equal roots.
find the domain of the function:
y=2/x-1