- A63
- B32
- C4
- D126
Step-by-Step Solution
Leak rate = 1/14 − 1/18 = 9/126 − 7/126 = 2/126 = 1/63 tank per hour, so the leak empties the tank in 63 hours.
Answer: A) 63
Normally a tap fills a tank in 14 hours, but because of a leak it now takes 18 hours. Working alone, how long would the leak take to empty a full tank (in hours)?
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