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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
Explain the concept of direct variation.
Fill in the blank in of the following so as to make the statement true:
Two quantities are said to vary......... with each other if they increase (decrease) together in such a way that the ratio of the corresponding values remains same.
Fill in the blank in of the following so as to make the statement true:
x and y are said to vary directly with each other if for some positive number k ....,...... = k.
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