Question: A tank containing water started to leak. Did the tank contain more than 30 gallons of water when it started to leak? (Note: 1 gallon = 128 ounces)
(1) The water leaked from the tank at a constant rate of 6.4 ounces per minute.
We have no idea what the size of the tank is. Insufficient.
(2) The tank became empty less than 12 hours after it started to leak.
We have no idea what the rate of the leak is. Insufficient.
(1+2) Statement 1 tell us that water leaked at a constant rate of 6.4 ounces per minute. Statement 2 tells us that the tank became empty
less than 12 hours after it started to leak.
Lets use extreme scenarios:
The tank became empty less than
1 second after it started to leak. Did the tank contain more than 30 gallons? No.
The tank became empty less than
11.99 hours after it started to leak. Did the tank contain more than 30 gallons? Yes
6.4 * 60 * 12 = 4600
30 * 128 = 3840
We can't conclude the tank contained more than 30 gallons. Insufficient.
Answer is E. _________________
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