Скачать или смотреть TIME AND WORK- R D SHARMA- CLASS-8- Ex-11.1- Q26, Q27 and Q28

TIME AND WORK- R D SHARMA- CLASS-8- Ex-11.1- Q26, Q27 and Q28

Ex-11.1

26. A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak?

27. A cistern has two inlets A and B which can fill it in 12 hours and 15 hours respectively. An outlet can empty the full cistern in 10 hours. If all the three pipes are opened together in the empty cistern, how much time will they take to fill the cistern completely?

28. A cistern can be filled by a tap in 4 hours and emptied by an outlet pipe in 6 hours. How long will it take to fill the cistern if both the tap and the pipe are opened together?

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