Question

If the cost of 23 packets of biscuits is ₹115, then what is the cost of 80 packets?

• A. ₹400
• B. ₹440
• C. ₹380
• D. ₹420

Answer 1

The correct option is A ₹400

Given, the cost of 23 packets of biscuits is ₹115.

We know that if the number of packets of biscuit increase, then the cost will also increase.

$\text{Number of packets}\left(x\right)\propto \text{Cost}\left(y\right)$
$\therefore \frac{x_1}{y_1}=\frac{x_2}{y_2}$

Given,
$x_1=23packets$
$y_1=₹115$
$x_2=80packets$
$\text{and}{y}_2=\text{cost of 80 packets}$

$\Rightarrow \frac{23}{115}=\frac{80}{y_2}$

$\Rightarrow y_2=\frac{115\times 80}{23}=400$

So, the cost of 80 packets of biscuits is ₹400.