A patrol car travels 1,200 km per month. If tyres need replacement every 15,000 km and the car uses 4 tyres, what is the monthly cost of tyre wear if each tyre costs $180?

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Multiple choice — select the best answer

A$57.60
B$57.00
C$57.60
D$60.00

✓ Correct answer: C. $57.60 Monthly distance = 1,200 km. Each tyre lasts 15,000 km. Monthly tyre consumption = 4 tyres × (1,200/15,000) = 4 × 0.08 = 0.32 tyres per month. Monthly cost = 0.32 × $180 = $57.60. Option C is correct.

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A patrol car travels 1,200 km per month. If tyres need replacement every 15,000 km and the car uses 4 tyres, what is the monthly cost of tyre wear if each tyre costs $180?

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