Advertisements
Advertisements
प्रश्न
30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10 days?
Advertisements
उत्तर
∵ 30 persons can reap a field in 17 days.
1 person can reap the same field in 30 × 17 i.e. 510 days.
In 10 days, the number of persons required = `510/10` = 51 persons.
APPEARS IN
संबंधित प्रश्न
A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. In the following table, find the parts of the base that need to be added.
| Parts of red pigment | 1 | 4 | 7 | 12 | 20 |
| parts of base | 8 | .... | .... | .... | .... |
A car is travelling at the average speed of 50 km/hr. How much distance would it travel in 12 minutes?
Rakesh can do a piece of work in 20 days. How much work can he do in 4 days?
Mohan takes 9 hours to mow a large lawn. He and Sohan together can mow it in 4 hours. How long will Sohan take to mow the lawn if he works alone?
Reema weaves 35 baskets in 25 days. In how many days will she weave 55 baskets?
For 9 cows, 13 kg 500 g of food supplements are required every day. In the same proportion, how much will be needed for 12 cows?
100 persons had food provision for 24 days. If 20 persons left the place, the provision will last for ______.
l varies directly as m and l is equal to 5, when `m = 2/3`. Find l when `m = 16/3`.
Match each of the entries in Column I with the appropriate entry in Column II
| Column I | Column II |
| 1. x and y vary inversely to each other | A. `x/y` = Constant |
| 2. Mathematical representation of inverse variation of quantities p and q |
B. y will increase in proportion |
| 3. Mathematical representation of direct variation of quantities m and n |
C. xy = Constant |
| 4. When x = 5, y = 2.5 and when y = 5, x = 10 | D. `p oo 1/q` |
| 5. When x = 10, y = 5 and when x = 20, y = 2.5 | E. y will decrease in proportion |
| 6. x and y vary directly with each other | F. x and y are directly proportional |
| 7. If x and y vary inversely then on decreasing x | G. `m oo n` |
| 8. If x and y vary directly then on decreasing x | H. x and y vary inversely |
| I. `p oo q` | |
| J. `m oo 1/n` |
Pattern B consists of four tiles like pattern A. Write a proportion involving red dots and blue dots in pattern A and B. Are they in direct proportion? If yes, write the constant of proportion.
