1. There is a certain amount of which A takes 30% then B takes 60% of the remaining amount, then C takes 80% of the remaining amount. Now if the amount left is 2,536.8 then what is the actual sum? (1)
- (1) Rs. 45,300
- (2) Rs. 45,500
- (3) Rs. 42,600
- (4) Rs. 48,400
- (5) None of these
2. In a class there are 60 boys whose average age is decreased by 1.5 months, when 1 boy aged 25 years is replaced by a new boy. Find the age of the new boy. (3)
- (1) 16 years
- (2) 15 years
- (3) 17.5 years
- (4) 19 years
- (5) None of these
3. Two vessels A and B contains milk and water mixed in the ratio 9:8 and 4:3 respectively. The ratio in which these two mixture be mixed to get a new mixture containing 800/17% milk is (2)
- (1) 13:5
- (2) 12:7
- (3) 11:7
- (4) 12:5
- (5) None of these
4. What will be the total surface area of a solid cone having diameter and height 14 m and 24 m respectively ? (take π = 22/7) (3)
- (1) 710
- (2) 708
- (3) 704
- (4) 720
- (5) None of these
5. There are 8 filling pipes each capable of filling a cistern alone in 26 minutes and 6 emptying pipes each capable of emptying a cistern alone in 24 minutes. All pipes are opened together and as a result, tank fills 27 litres of water per minute. Find the capacity of the tank. (4)
- (1) 445 l
- (2) 458 l
- (3) 460 l
- (4) 468 l
- (5) None of these