Question

the cost of 15 packets of biscuits, each weighting 750 grams, is rs. 300. what will be the approximate cost of 25 packets, if each packet weighs 1 kg? (note: it is known that cost of each packet depends on its weight) timeline

Answer 1

The approximate cost of 25 packets weighting 1 kg will be Rs. 666.75

Explanation

The cost of 15 packets of biscuits, each weighting 750 grams is Rs. 300

So, the cost of each packet weighting 750 grams will be:  $\frac{300}{15}=Rs. 20$

Suppose, the cost of each packet weighting 1 kg is  $x$

Now, 1 kg = 1000 grams

So according to the ratio of "cost" to "weight" , the equation will be ............

$\frac{x}{1000}=\frac{20}{750}\\ \\ 750x=20000\\ \\ x=\frac{20000}{750}=26.666.... \approx 26.67$

Thus, the approximate cost of 25 packets weighting 1 kg will be:  $Rs. 26.67\times 25 =Rs. 666.75$