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AQA · GCSE · Physics · Higher

Nuclear Station Operating Days

Q02.5 2 marks

Nuclear power stations do not generate electricity every day of the year.

One nuclear power station generated electricity for 92% of a year.

one year = 365 days

Calculate the number of days during the year that the nuclear power station generated electricity.

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Marking points

  1. 1 Calculates 92% of 365.
  2. 2 Obtains 335.8 days, or an allowed whole-day value of 335 or 336.

Full-mark answer

0.92×365=335.80.92\times365=335.8 days, so the station generated electricity for about 336 days.

Why this answer loses marks

I subtracted the percentage from the number of days.

The question asks for a percentage of the whole year, so convert the percentage to a multiplier and apply it to the total.