After 38 litres of petrol were poured into an empty tank, it was still 5% empty. How much petrol more must be poured into the tank in order to fill it?
Explanation:
Let the capacity of tank be C liters
Then, 0.95 C = 38 liters
∴ C = 38/0.95 = 40 liters
Now, (40 - 38=) 2 liters of petrol must be poured to fill the tank.
Hence, option (d).
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