a large tanker can be filled by two pipes a and b in 60 minutes and 40 minutes respectively. how many minutes will it take to fill the tanker from empty state if b is used for half the time and a and b fill it together for the other half? a. 15 min b. 20 min c. 27.5 min d. 30 min
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a large tanker can be filled by two pipes a and b and 60 minutes and 40 minutes respectively how many minutes will be taken to fill the tanker from empty state if be used for half the diamond and a and b feel sit together for the
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a large tanker can be filled by two pipes a and b in 60 minutes and 40 minutes respectively. how many minutes will it take to fill the tanker from empty state if b is used for half the time and a and b fill it together for the other half? a. 15 min b. 20 min c. 27.5 min d. 30 min.
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