IBPS Government Jobs Exams Numerical Ability Pipes and Cistern

A pump can fill a tank with water in 2 hours. Because of a leak, it took 2⅔ hours to fill the tank. The leak can drain all the water of the tank in
A)9 hours B)8 hours C)10 hours D)6 hours

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IBPS Other Question

The percentage of metals in a mine of lead ore is 60%. Now the percentage of silver is 3/4% of metals and the rest is lead. If the mass of ore extracted from the mine is 8000 kg, the mass (in kg) of lead is:
A)4763 B)4764 C)4762 D)4761 E)4264 If the difference between the compound interest (compounded annually) and the simple interest accrued in one and a half years at 8% per annum is Rs. 80. What is the simple interest in three years on the same amount and at the same rate of interest?
A)Rs. 6400 B)Rs. 7200 C)Rs. 5600 D)Rs. 4800 E)None of these