question_answer

Direction: Choose the most appropriate option.

Taps 'A and 'B' can fill a tank in 37 Vi minutes and 45 minutes respectively. Both taps are opened and after some time tap 'B' is turned off. The tank is filled completely in exactly 30 minutes, if tap 'B' is turned off after

A) 9 minutes     

B) 10 minutes

C) 15 minutes   

D) 12 minutes