Question:
The pollution in a normal atmosphere is less than 0.01%. Due to the leakage of a gas from a factory, the pollution is increased to 20%. If everyday 80% of the pollution is neutralized, in how many days the atmosphere will be normal?
A) 3
B) 4
C) 5
D) 6
Answer: C) 5
The pollution in a normal atmosphere is less than 0.01%. Due to the leakage of a gas from a factory, the pollution is increased to 20%. If everyday 80% of the pollution is neutralized, in how many days the atmosphere will be normal?
A) 3
B) 4
C) 5
D) 6
Answer: C) 5
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