GRADE 9 math problem?
Two full water storage tanks are being drained for mantainence. The first tank holds 800 L of water and drains at a rate of 18 L/min. The second tank holds 500 L of water and drains at a rate of 7 L/min. Use an inequality to determine when the first tank will contain less water then the second tank.
Heres what I did, I think I did it wrong though.
800/18m < 500/7m
800/18m x 18m < 500/7m x 18m
800 < 500 x 11m
800/m < 500 x 11m/m
800/m < 500 x 11
800/m < 5500
Now what
Comments
800 - 18m < 500 - 7m
11m > 300
m > 27.27