AP Police Constable previous year question
The population of a village increases at the rate of 25% per annum. If its population at the end of the year 2015 is 4000, then its population at the end of 2017 will be:
Asked in AP Police Constable Prelims: 2016 (06 Nov 2016) · Quantitative Aptitude
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Correct answer: (B) 6250
Given:
Population at the end of 2015 = 4000
Rate of increase = 25%
Formula:
Increased population = Present population × (100 + x)/100
Where x = rate of increase
Calculation:
Population at the end of 2017 = 4000 × (1 + 25/100) 2
⇒ 4000 × 5/4 × 5/4 = 6250
∴ Population at the end of 2017 = 6250
हिंदी में प्रश्न
ఒక గ్రామ జనాభా సంవత్సరానికి 25% చొప్పున పెరుగుతుంది. 2015 సంవత్సరాంతానికి దాని జనాభా 4000 అయితే, 2017 సంవత్సరాంతానికి దాని జనాభా:
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 6250
दिया गया है:
2015 के अंत में जनसंख्या = 4000
वृद्धि दर = 25%
सूत्र:
बढ़ी हुई जनसंख्या = वर्तमान जनसंख्या × (100 + x)/100
जहाँ x = वृद्धि दर
गणना:
2017 के अंत में जनसंख्या = 4000 × (1 + 25/100)²
⇒ 4000 × 5/4 × 5/4 = 6250
∴ 2017 के अंत में जनसंख्या = 6250
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