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प्रश्न
If the present population of a city is P and it increases at the rate of r% p.a, then the population n years ago would be `"P"(1 + "r"/100)^"n"`
विकल्प
True
False
उत्तर
False
Explanation;
Hint:
Let the population ‘n’ years ago be ‘x’
∴ Present population (P) = `x xx (1 + "r"/100)^"n"`
∴ x = `"P"/(1 + "r"/100)^"n"`
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