Q. The speed of a metro engine is 42 km./ hr when no compartment is attached and the reduction of speed is directly proportional to the square root of the number of the compartment attached. If the engine is 24 km/hr when 9 compartments are attached, the maximum number of compartments that can be carried by the engine is -
1) 48
2) 47
3) 49
4) None of these
Q. Total expenses of a boarding house are partly fixed and partly varying linearly with the number of boarders. The average expense per boarder and Rs. 700 when there are 25 boarders and Rs. 600 when there are 50 boarders. What is the average expense per boarder when there are 100 boarders?
1) Rs.560
2) Rs.540
3) Rs.550
4) None of these
Q. Six parts of oil are mixed with one part of water. When five liters of water are added to the mixture, the mixture is found to contain 5 times as much oil as water. How many liters of oil was there in the first mixture -
1) 150
2) 120
3) 100
4) None of these
Q. A machinist by increasing his normal rate of work by 12.5 % could produce 15 items more, in a given period of time. How many items can he produce if he works at 80% of his normal rate?
1) 100
2) 90
3) 80
4) 96
Q. In a History examination, the average for the entire class was 80 marks. If 10% of the students of scored 95 marks. and 20% scored 90 marks, what were the average marks of the remaining students in the class?
1) 65.5
2) 85
3) 75
4) 72.5
Q. 150 cc of pure alcohol is diluted by adding 650 cc of water. The new 800 cc mixture contains the following quantity of pure alcohol -
1) 0.65 litre
2) 0.15 litre
3) 0.40 litre
4) None of these
Q. A and B enter into a partnership investing Rs. 12,000 and Rs .16,000 respectively. After 8 months, C also joins the business With a capital of Rs.15,000. The share of C in a profit of Rs 45,600 after two years is -
1) Rs.12,000
2) Rs.14,000
3) Rs.19,200
4) Rs.21,200
Q. A person spends 60% of his income. If his monthly is Rs.3000, his monthly savings in Rs. will be -
1) 1500
2) 1800
3) 1400
4) 1200
Q. Two trains, 121 m, and 99 m long are running in opposite directions at the speeds of 40 kmph and 32 kmph respectively. At what time will they completely cross each other from the moment they meet?
1) 11 sec.
2) 8 sec.
3) 9 Sec.
4) None of these
Q. One side of a right-angled triangle is 126 cm. The difference between the hypotenuse and the other side is 42 cm. The length of the hypotenuse is -
1) 168 cm
2) 189 cm
3) 210 cm
4) None of these
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