std 12 history | std GCERT 8 hours full marathon class in gujarati | gujarat hoard itihas

A tank can be filled by two taps A\ a n d\ B in 12 hours and 16 hours respectively. The full tank can be emptied by a third tap in 8 hours. If all the taps be turned on at the same time, in how much time will the empty tank be filled up completely?

Pipes A and B can fill a tank in 6 hours and 8 hours respectively and pipe C can empty the full tank in 12 hours. All three pipes are opened together, but pipe A is closed after 3 hours. In how many hours will the remaining part of the tank be filled? पाइप A और पाइप B किसी टंकी को क्रमशः 6 और 8 घंटे में भर सकते हैं तथा पाइप C भरी हुई टंकी को 12 घंटे में खाली कर सकता है | इन तीनो पाइप को एक साथ खोल दिया जाता है लेकिन 3 घंटे बाद पाइप A बंद कर दिया गया | टंकी का शेष हिस्सा कितने घंटे में भरेगा ?

There is leak in the bottom of a tank. This leak can empty a full tank in 8 hours. When the tank is full, a tap is opened into the tank which admits 6 litres per hour and the tank is now emptied in 12hours.What is the capacity of the tank? A)28.8 litres B)36 litres C)144 litres D)Can't be determined

Two pipes, when working one at a time, can fill a cistern in 3 hours and 4 hours,respectively while a third pipe can drain the cistern empty in 8 hours. All the three pipes were opened together when the cistern was 1/12 full. How long did it take for the cistern to be completely full?

A leak in the bottom of a tank can empty the full Tank in 8 hours.An inlet pipe fills water at the rate of 6 litres a minute.When the tank is full the inlet is opened and due to the leak,the tank is empty in 12 hours.How many litres does the tank hold? 7580 b.8290 c.7960 d.8640

A tap can completely fill a water tank in 8 hours. The water tank has a hole in it through which the water leak, out. The leakage will cause the full water tank to get mph it, 12 hours. How much time will it take for the tap to fill the tank completely with the hole? 16 hou r s b. 18 hou r s c. 24 hou r s d. none of these