Task: Question Answering
Input (English): Problem: one gear of pulley rotates at a speed of 3 rev / sec another gear roates at 5 rev / sec . if both start together after how many seconds will they be together again 
Options: a ) 3 sec , b ) 5 sec , c ) 15 sec , d ) 20 sec , e ) 25 sec
Output (English): c