21). If 30 men working 9 h per day can reap a field in 16 days, in how many days, will 36 men reap the field working 8 h per day?
| A). 15 |
| B). 25 |
| C). 18 |
| D). 10 |
|
22). In a race, Ravi covers 5 km in 20 min. How much distance will he cover in 100 min?
| A). 40 km |
| B). 35 km |
| C). 26 km |
| D). 25 km |
|
23). A garrison of 1000 men had provisions for 48 days. However, a reinforcement of 600 men arrived. How long will now food last for?
| A). 35 days |
| B). 30 days |
| C). 25 days |
| D). 45 days |
|
24). A tree is 12 m tall and casts an 8 m long shadow. At the same time, a flag pole casts a 100 m long shadow. How long is the flag pole?
| A). 150 m |
| B). 200 m |
| C). 125 m |
| D). 115 m |
|
25). If 12 persons working 16 h per day earn Rs.33600 per week, then how much will 18 persons earn working 12 h per day?
| A). Rs.40000 |
| B). Rs.35000 |
| C). Rs.28800 |
| D). Rs.37800 |
|
26). A man and a boy working together can complete a work in 24 days. If for the last 6 days, the man alone does the work, then it is completed in 26 days. How long will the boy take to complete the work alone?
| A). 72 days |
| B). 73 days |
| C). 49 days |
| D). 62 days |
|
27). 25 men can reap a field in 20 days. When should 15 men leave the work, if the whole field is to be reaped in \( \Large 37\frac{1}{2} \) days after they leave the work?
| A). After 5 days |
| B). After 10 days |
| C). After 9 days |
| D). After 7 days |
|
28). If 12 engines consume 30 metric tonnes of coal when each is running 18h per day, how much coal will be required for 16 engines, each running 24 h per day, it being given that 6 engines of former type consume as much as 8 engines of latter type?
| A). 10 tonnes |
| B). 5 tonnes |
| C). 25 tonnes |
| D). 40 tonnes |
|
29). 8 men can complete a work in 12 days, 4 women can complete it in 48 days and 10 children can complete the same work in 24 days. In how many days can 10 men, 4 women and 10 children complete the same work?
| A). 10 days |
| B). 5 days |
| C). 7 days |
| D). 6 days |
|
30). 20 men complete one-third of a work in 20 days. How many more men should be employed to finish the rest of the work in 25 more days?
| A). 10 |
| B). 12 |
| C). 15 |
| D). 20 |
|
