Question

When fresh fish is dried it becomes $\frac{1}{2}$ of its weight.

We buy fresh fish for	₹15 per kg
We sell dried fish for	₹70 per kg

What is the amount of money earned in selling 2 kg of dried fish?

Answer 1

Price of fresh fish = ₹15 per kg
Price of dried fish = ₹70 per kg

We need to calculate the money earned from selling 2 kg of dried fish.
Fresh fish when dried, becomes $\frac{1}{2}$ of its weight.
So, to get 2 kg of dried fish, 4 kg of fresh fish should be bought. (Since half of 4 is 2)

Amount paid for 4 kg of fresh fish = ₹15 × 4 = ₹60
Amount received by selling 2 kg of dried fish = ₹70 × 2 = ₹140

Amount earned by selling 2 kg of dried fish = ₹140 - ₹60 = ₹80