Pipe a can fill a tank in 30 mins and pipe b can fill it in 28 mins.if 3/4th of the tank is filled by pipe b alone and both are opened, how much time is required by both the pipes to fill the tank completely ?
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3/4 the of tank filled by pipe b
pipe b can fill in 24 min
I.e 3/4th part is filled in 21 min by pipe b
remaining 1/4 part will be filled by both a &b
pipe A can fill that part in =30/4=7.25
so that part filled time=1/7.25+1/7
pipe b can fill in 24 min
I.e 3/4th part is filled in 21 min by pipe b
remaining 1/4 part will be filled by both a &b
pipe A can fill that part in =30/4=7.25
so that part filled time=1/7.25+1/7
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