Question

I bought 3 litre oil from the shop and I paid 22.50 per 100 ml . What is the price of 3 litre ?​

Answer 1

cost of 100 ml of oil = 22.5

therefore cost 1L = 22.5 ×10 = 225

cost of 3L of oil = 225 × 3 = 675

Answer = Rs 675

Answer 2

Answer:

$cost \: of \: 100 \: ml \: of \: oil = 22.50 \\ cost \: of \: 1ml \: of \: oil \: = \frac{22.50}{100} \\ cost \: of \: 3 \: litre \: of \: oil \: = \frac{22.50}{100} \times 3000 \: \: \: \: (3 \: litre = 3000 \: ml) \\ cost \: of \: 3 \: litre \: of \: oil = \frac{2250}{100 \times 100} \times 3000 \\ cost \: of \: 3 \: litre \: of \: oil = 225 \times 3 = 675$

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