Question 65

A sink contains exactly 12 litres of water. If water is drained from the sink until it holds exactly 6 litres of water less than the quantity drained away, then how many litres of water were drained away?

Solution

Let, the amount of water drained be 'x'

Then total amount of water left in sink = x - 6

$$\therefore$$ x + x - 6 = 12

2x - 6 = 12 (or) x = 9L

Hence, option D is the correct answer.

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