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

Cost of 93 in of plastic sheet = Rs. 1395
Let cost of 105 in of such sheet = Rs. x
Therefore
$\begin{array}{ccc}\text{Plstic sheet in m}& 93& 105\\ \text{Cost (in Rs.)}& 1395& x\end{array}$
$\therefore \frac{93}{1395}=\frac{105}{x}\Rightarrow 93x=105\times 1395\Rightarrow x=\frac{105\times 1395}{93}=105\times 15=1575$
$\therefore$ Cost of 105 m sheet = Rs. 1575