Task: Question Answering
Input (English): Problem: two spherical balls lie on the ground touching. if one of the balls has a radius of 7 cm, and the point of contact is 10 cm above the ground, what is the radius of the other ball ( in centimeters ) ?
Options: a. 30 / 7, b. 50 / 3, c. 70 / 4, d. 80 / 5, e. 90 / 8
Output (English): c