Skip to content / सामग्री पर जाएँ
Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-10: Elementary Mathematics and General Mental Ability›Average, profit and loss, simple and compound interest›A Teak tree increases annually by 1/6 of its height. By how much will

A Teak tree increases annually by 1/6 of its height. By how much will it increase after 2 1/4 years, if it stand today 18 feet high ?

20192M#mppsc-forest#pyq#mcq#2019
A.25 feet
B.7.52 feetCorrect
C.4.52 feet
D.5.72 feet
Explanation & Solution

The correct answer is (B) 7.52 feet.

  • Growth Calculation: Height after 2 years =H0(1+16)2=H0(4936)= H_0 \left(1 + 16\frac{1}{6}61​\right)^2 = H_0 \left(4936\frac{49}{36}3649​\right)=H0​(1+61​)2=H0​(3649​). Net height increase =H0(1336)=20.8×1336≈7.52 feet= H_0 \left(1336\frac{13}{36}3613​\right) = 20.8 ×\times× 1336\frac{13}{36}3613​ ≈\approx≈ 7.52 feet\text{ feet} feet=H0​(3613​)=20.8×3613​≈7.52 feet.

हिंदी में प्रश्न एवं आदर्श उत्तर

एक सागौन का वृक्ष सालाना अपनी ऊँचाई का 1/6 भाग बढ़ता है । यदि यह आज 18 फीट ऊँचा है, तो 2 1/4 वर्ष बाद यह कितना बढ़ जाएगा ?

A.25 फीट
B.7.52 फीटसही
C.4.52 फीट
D.5.72 फीट

सही उत्तर (B) 7.52 feet है।

  • वृद्धि की गणना: 2 वर्ष पश्चात कुल ऊँचाई =H0(1+16)2=H0(4936)= H_0 \left(1 + 16\frac{1}{6}61​\right)^2 = H_0 \left(4936\frac{49}{36}3649​\right)=H0​(1+61​)2=H0​(3649​)। कुल ऊँचाई वृद्धि =20.8×1336≈7.52 फीट= 20.8 ×\times× 1336\frac{13}{36}3613​ ≈\approx≈ 7.52 फीट\text{ फीट} फीट=20.8×3613​≈7.52 फीट होती है।
See this question in context →
WhatsApp