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Academics – Mathematics : 2013/JUL/01
Question

Q1. (a) A garage services three cars A, B and C. The cost for A is 1⅔ the cost for B.

The cost for C is 80% of the cost for B.

The total cost for servicing all three cars is £1040.

Calculate the cost for servicing EACH car. (6)

(b) A ship’s speed is increased by 20% above normal for 8 hours, reduced by 15% below normal for 10 hours and is normal for the remaining 6 hours of the day. The fuel consumption per unit time is directly proportional to the cube of the ship’s speed, V.

Calculate the percentage increase in the fuel consumption above the normal for the day in question. (10)

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