IBPS Government Jobs Exams Numerical Ability Pipes and Cistern

Tank at a water supply station is filled with water by several pumps. At first, three pumps of the same capacity are turned on. 2½ hours later, two more pumps (both of same efficiencies) of different capacity are set into operation. After 1 hour, it was observed that 15 m³ was still left to fill to its capacity. In another hour the tank was full. One of the two additional pumps could have filled the tank in 40 hours. What is the volume of the tank?
A) 75 m³ B) 90 m³ C) 60 m³ D) 80 m³ E) None of these

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IBPS Other Question
A fruit vendor sells apples and oranges and gets equal revenue from each. He gets a profit of 20% on each apple and a profit of 25% on each orange. If the ratio of the number of oranges sold to the number of apples sold is 3:2, what is the ratio of the cost price of an orange to that of an apple?
A) 25:16 B) 16:25 C) 36:25 D) 49:36 E) 36:49 Meena has some money. She can buy 40 books or 90 pens with it. She keeps 20% of the money for food and with the remaining buys 36 pens and some books. Find the number of books she buys.
A) 12 B) 15 C) 14 D) 16 E) 18