Taps A and B can fill a bucket in 10 minutes each. If both are opened and A is closed after 3 minutes, how much further time would it take for B to fill the bucket?
Choose the most appropriate option: A) 2 min. 6sec. B) 2min. 10sec. C) 4min. 12sec. D) 2 mins E) 3min.
Explanation:   Part filled in 3 minutes =   3∗(1/10+1/10)=3∗1/5=3/5   Remaining part =1−4/5=1/5   =&gt;1/10:1/5=1:X   =&gt;X=2   =&gt;X=2 mins   So it will take further 2 mins to fill the bucket.   Option 2 mins
<result>D</result>
Taps A and B can fill a bucket in 10 minutes each. If both are opened and A is closed after 3 minutes, how much further time would it take for B to fill the bucket?