Question

N liters of oil is poured into a tank & it was still e% empty. How much oil must

Answer 1

Answer:

n� litres of oil was poured into a tank and it was still e% empty. How much oil must be poured into the tank in order to fill it to the brim.

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The n litres occupies (100-e)% of the tank.

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Proportion:

Let x litres be the capacity of the tank

n/(100-e)% = x/100%

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x = n/(100-e)%

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The tank already has n litres in it.

You need [n/(100-e)%]-n = [100n/(100-e)]-n

= [100n-n(100-e)]/(100-e)

= ne/(100-e) litres to fill the tank

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Cheers,

Stan H.

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