Task: Question Answering
Input (English): Problem: water is leaking out from a cylinder container at the rate of 0.31 m ^ 3 per minute. after 10 minutes, the water level decreases 1 / 16 meters. what is value of the radius in meters ?
Options: a. 1 / 4, b. 2, c. 4, d. 8, e. 12
Output (English): c