15. Two leaky containers are filling with water. Water enters container A at a rate of 2/3 cup per 1/2 minute and leaks out at rate of 1/4 cup per 3/4 minute. Water enters container B at a rate of 3/4 cup per 1/2 minute and leaks out at a rate of 1/2 cup per 3/4 minute. Which container needs to be filled faster in order for both
containers to gain the same amount of water per minute? By how much more water per minute? Explain.