Water flows into the cylindrical tank at a constant rate. After 1 minute there are 40 litres
of water in the tank.
0.5 m
1.6 m
Assuming the flow continues at the same rate
find the total time needed to fill the tank
(give your answer correct to the nearest second)

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

step-by-step explanation:

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)