exam
Maths Puzzle
Numerical Ability
How long will it take $8000 to triple itself if it is invested at 6% simple interest.
Read Solution (Total 1)
2*8000=8000*6*t/100
t=100/3
t=33.33year
10 years ago
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a tank holds 80 liters of a chemical solution. currently, the solution has a strenght of 30%. how much of this solution must be drained and replaced with a 70% solution to get a strenght of 40%?
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