Tap A and B can fill a tank in 18 and 24 hours respectively .Both were opened when the tank was empty .The tank is to b filled in 12 hours .After how many hours should tap A be closed ?
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18/24=x/12
18/24*12=x
x=9 hours
Ans. The tap A should be closed after 9 hours
18/24*12=x
x=9 hours
Ans. The tap A should be closed after 9 hours
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