What quantity of pure petrol will the seventh customer get?

A petrol tank at a filling station has a capacity of 400 litres. The attendant sells 40 litres of petrol from the tank to one customer and then replenishes it with kerosene oil. This process is    repeated with six customers. What quantity of pure petrol will the seventh customer get when he purchases 40 litres of petrol?

  1. 50 litres
  2. 25 litres
  3. 25 litres
  4. None of these
Anurag Mishra Professor Asked on 29th January 2016 in Maths.
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  • 1 Answer(s)

    Answer: (4) None of these 

    Anurag Mishra Professor Answered on 29th January 2016.
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