Advertisements
Advertisements
प्रश्न
In a library 136 copies of a certain book require a shelf-length of 3.4 metre. How many copies of the same book would occupy a shelf-length of 5.1 metres?
Advertisements
उत्तर
| Number of copies | 136 | x |
| Length the shelf (in m) | 3.4 | 5.1 |
Let x be the number of copies that would occupy a shelf-length of 5.1 m.
\[\text{ Since the number of copies and the length of the shelf are in direct variation, we have: } \]
\[\frac{136}{x} = \frac{3 . 4}{5 . 1}\]
\[ \Rightarrow 136 \times 5 . 1 = x \times 3 . 4\]
\[ \Rightarrow x = \frac{136 \times 5 . 1}{3 . 4}\]
\[ = 204\]
\[\text{ Thus, 204 copies will occupy a shelf of length 5 . 1 m } .\]
संबंधित प्रश्न
Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map?
Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map?
Fill in the blank in of the following so as to make the statement true:
If u = 3 v, then u and v vary .... with each other.
Suneeta types 1080 words in one hour. What is her GWAM (gross words a minute rate)?
In 15 days, the earth picks up 1.2 × 108 kg of dust from the atmosphere. In how many days it will pick up 4.8 × 108 kg of dust?
A and B can do a piece of work in 20 days and B in 15 days. They work together for 2 days and then A goes away. In how many days will B finish the remaining work?
The number of teeth and the age of a person vary ______
The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?
It is given that l varies directly as m. Write an equation which relates l and m.
From the following table, determine if x and y are in direct proportion or not.
| x | 3 | 6 | 15 | 20 | 30 |
| y | 12 | 24 | 45 | 60 | 120 |
