pipe A can empty a filled tank in 28 hours while pipe B can fill the same tank when empty in 35 hours . If alternative pipes A and B are turned on for an hour each time . starting when the tank is full . How long it will take to empty the tank
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1/35 -1/28=- 7/(35*28)
i.e -1/140
so 5th part will be emptied in 1 he
next hr 4th part will be filled again
so in 2 hrs 1th part of the tank will be filled
till 135th part and 270 hrs it is all the way same
but after it., a will empty the tank in 1hr
so Ans= 271 hrs
please mark as brainliest answer
i.e -1/140
so 5th part will be emptied in 1 he
next hr 4th part will be filled again
so in 2 hrs 1th part of the tank will be filled
till 135th part and 270 hrs it is all the way same
but after it., a will empty the tank in 1hr
so Ans= 271 hrs
please mark as brainliest answer
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