Task: Question Answering
Input (English): Problem: 50 men took a dip in a water tank 30 m long and 20 m broad on a religious day. if the average displacement of water by a man is 4 m 3, then the rise in the water level in the tank will be :
Options: a. 20 cm, b. 25 cm, c. 33.3 cm, d. 50 cm, e. none of these
Output (English): c