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Two taps can fill together a tank in 6 hr 40 minutes. One can fill it independently in 12 hrs, the other can fill in

A8 hrs

B15 hrs

C5 hrs

D20 hrs

Answer:

B. 15 hrs

Read Explanation:

x = 6 hrs 40 min = 400 minutes y = 12 hrs = 720 minutes xy/(y-x)= (400 x 720)/(720-400)= 900 min 900/60 hrs = 15hrs


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