Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

If the Rule of 70 gives a doubling time of 35 years but the actual growth rate falls every decade, what will the real doubling time likely be?

Answer and explanation

Correct answer: More than 35 years

The Rule of 70 estimates doubling time by assuming that the annual growth rate stays constant. A result of 35 years is therefore based on a fixed rate throughout those 35 years. If the actual rate falls every decade, the population does not continue growing at the original speed.

Because growth becomes slower, the population will need longer than the constant-rate estimate to double. Thus the real doubling time will likely be more than 35 years, making option C correct. It may even fail to double within the initially estimated period, depending on how sharply the rate declines. It cannot reasonably be less than 35 years under the stated falling-rate condition.

Related tags

Rule Of 70Doubling TimeDeclining Growth RatePopulation ProjectionPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.