Question

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?

Answer 1

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.

\[\text{ If more sheets are bought, the cost will also be more } . \]
\[\text{ Therefore, it is a direct variation .}  \]
\[\text{ We get } : \]
\[93: 105 = 1395: x\]
\[ \Rightarrow \frac{93}{105} = \frac{1395}{x}\]
\[\text{ Applying cross muliplication, we get: }  \]
\[x = \frac{105 \times 1395}{93}\]
\[ = 1575\]
\[\text{ Thus, the required cost will be Rs 1, 575 } .\]