The water now in the sump shown is to be pumped out: pump A runs for x minutes and pump B for y minutes, at the rates shown. Write the equation, and find for how long B must run if A runs for 12 minutes.

Question

Accepted Answer

20 min. The water is at the 1200 L mark, so 50x + 30y = 1200 . With x = 12 : 30y = 1200 - 600 = 600 y = 20 minutes.

The water now in the sump shown is to be pumped out: pump A runs for $x$ minutes and pump B for $y$ minutes, at the rates shown. Write the equation, and find for how long B must run if A runs for 12 minutes.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Work and Rate Equations practice