Question

If a car runs on 40 km per litre (1 liter=85), how much it will cost if we drive 15 km?​

Answer 1

Step-by-step explanation:

As for 40km we require 1L

therefore,

$for \: 15km \: we \: require = \: 15 \times \frac{1}{40} \\ = \frac{3}{8} \\ = 0.375$

now as 1L costs 85

therefore,

it will cost 0.375x85 for 15km, which is equal to 31.875

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Answer 2

40 km cost = 85

1 km cost = 85/40

15 km cost = 15 × 85/ 40

= 31.875