pipe A can fill a cristern in 5 hours and B can fill it in 6 hours both the pipe are opened and after two hours pipe A is closed . how much time will B take to fill the remaining part of tank
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1
Answer:
15/24 hours
Step-by-step explanation:
pipe -a= 5hrs =1/5 part
pipe-b= 6hrs =1/6 part
1hr= 1/5+1/6=6+5/30=11/30
2hr=11/30 * 2=11/15
remaining=1-11/15 = 4/15
work took for pipe-b for filling= 4/15*6=24/15
work=24/15
time=15/24hours
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