Task: Question Answering
Input (English): Problem: a cistern 5 m long and 4 m wide contains water up to a depth of 1 m 25 cm. the total area of the wet surface is :
Options: a. 49 m 2, b. 42.5 m 2, c. 53.5 m 2, d. 55 m 2, e. 57 m 2
Output (English): b