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The tank full of petrol in Haroon's motorcycle lasts for 10 days, if he starts using 25% more every day for how many days will the tank full of petrol last?

Correct answer: D. 8days

  • A. 5days
  • B. 6days
  • C. 7days
  • D. 8days

Explanation

If the normal daily consumption is 1 tank-day, using 25% more means consuming 1.25 tank-days per day. The duration is 10 tank-days ÷ 1.25 tank-days per day = 8 days. A student may choose 7 days by subtracting 25% of 10 from 10, which incorrectly treats the increase as a direct reduction in duration.

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