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प्रश्न
If the cost of 93 m of a certain kind of plastic sheet is Rs 1395, then what would it cost to buy 105 m of such plastic sheet?
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उत्तर
| Length of plastic sheet (in metre) | 93 | 105 |
| Cost (in Rs) | 1395 | x |
Let the cost of the plastic sheet per metre be Rs x.
If more sheets are bought, the cost will also be more
Therefore, it is a direct variation.
We get:
93 : 105 = 1395 : x
\[ \Rightarrow \frac{93}{105} = \frac{1395}{x}\]
Applying cross muliplication, we get:
x = `(105xx1395)/93`
x = 1575
Thus, the required cost will be Rs 1,575.
संबंधित प्रश्न
Which of the following quantities vary directly with each other?
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(ii) Weight of articles (x) and their cost (y).
(iii) Distance x and time y, speed remaining the same.
(iv) Wages (y) and number of hours (x) of work.
(v) Speed (x) and time (y) (distance covered remaining the same).
(vi) Area of a land (x) and its cost (y).
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In which of the following case, do the quantities vary directly with each other?
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