21). A bag contains 50 paise, 1 rupee and 2 rupee coins in the ratio 2 : 3 : 4. If the total amount is Rs.240, what is the total number of coins?
| A). 90 |
| B). 150 |
| C). 180 |
| D). 200 |
|
22). The ratio of the radii of the taps T1 and T2 is 2 : 1. Water flowing through them with the same velocity. What is the ratio of the time required to completely fill two identical drums kept under T1 and T2.
| A). 2 : 1 |
| B). 1 : 2 |
| C). 4 : 1 |
| D). 1 : 4 |
|
23). In a town, 80 % of the population are adults of which the men and women are in the ratio of 9 : 7, respectively. If the number of adult women is 4.2 lakh, what is the total population of the town?
| A). 12 lakh |
| B). 9.6 lakh |
| C). 9.8 lakh |
| D). 11.6 lakh |
|
24). Salaries of Akash, Bahu and Chintu are in the ratio of 2 : 3 : 5. If their salaries are increased by 15 % ,10% and 20% respectively, then what will be the new ratio of their salaries?
| A). 3 : 3 : 10 |
| B). 23 : 33 : 60 |
| C). 20 : 22 : 40 |
| D). None of these |
|
25). A cat takes 5 leaps for every 4 leaps of a dog but 3 leaps of the dog are equal to 4 leaps of the cat. What is the ratio of the speeds of the cat to that of the dog?
| A). 11 : 15 |
| B). 15 : 11 |
| C). 16 : 15 |
| D). 15 : 16 |
|
26). A sum of money is to be divided equally among P, Q and R in the respective ratio of 5 : 6 : 7 and another sum of money is to be divided between S and T equally. If S got Rs. 2100 less than P, then how much amount did Q receive?
| A). Rs. 2500 |
| B). Rs. 2000 |
| C). Rs. 1500 |
| D). Could not be determined |
|
27). Out of 120 applications for a post, 70 are males and 80 have a driver license. What is the ratio of between the minimum to maximum number of males having driver's license.
| A). 1 : 2 |
| B). 2 : 3 |
| C). 3 : 7 |
| D). 5 : 7 |
|
28). If A:B=2:3, B:C=5:7 and C:D = 3:10, then what is A:D equal to?
| A). 1:7 |
| B). 2:7 |
| C). 1:5 |
| D). 5:1 |
|
29). What is the mean proportional between (15+\( \Large \sqrt{200} \))and (27-\( \Large \sqrt{648} \))?
| A). 4 |
| B). 14\( \Large \sqrt{7} \) |
| C). 3\( \Large \sqrt{5} \) |
| D). 3\( \Large \sqrt{8} \) |
|
30). If A:B = 3:4 and B:C = 8:9, then find the value of A:B:C.
| A). 3:4:5 |
| B). 1:2:3 |
| C). 7:12:17 |
| D). 6:8:9 |
|
