Village X has a population of 68000, which is decreasing at the rate of 1200 per year, Village Y has a population of 42000, which is increasing at the rate of 800 per year. In how many years will the population of the two villages be equal?
- 12
- 13
- 14
- 15
Explanation
Village X population = 68000 – 1200p
Village Y population = 42000 + 800p
These two values should be equal.
So,
68000 – 1200p = 42000 + 800p
1200p + 800p = 68000 - 42000
2000p = 26000.
P = 26000 / 2000 = 13
The population of the two villages are equal after = 13years
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