If in one kg of the dish, the quantity by weight of Tomato, Onions, Potato and Corn-Flour is 200 gm, 150 gm, 250 gm and 400 gm on day 1 and 100 gm, 225 gm, 175 gm and 500 gm on day 4, then what is the increase in the cost of making 1 kg of the dish on day 4, when compared to day 1 (in paisa)?
Explanation:
Cost/kg for week 1: 0.2 × 21 + 0.15 × 10 + 0.25 × 44 + 0.4 × 35 = 4.2 + 1.5 + 11 + 14 = 30.7
Cost/kg for week 4: 0.1 × 25 + 0.225 × 16 + 0.175 × 60 + 0.5 × 50 = 2.5 + 3.6 + 10.5 + 25 = 41.6
Increase in cost per kg = 41.6 – 30.7 = Rs. 10.9 = 1090 paise
Hence, 1090.
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