चक्रवाढ व्याजामध्ये 3 वर्षांसाठी गुंतवणूक केल्यास आपल्या पैशाची रक्कम 4 पट होते. किती वर्षांमध्ये, हीच रक्कम स्वत:पेक्षा 16 वेळा होईल?

  1. 8
  2. 9
  3. 6
  4. 12

Answer (Detailed Solution Below)

Option 3 : 6
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Detailed Solution

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दिलेले:

चक्रवाढ व्याज 3 वर्षांच्या गुंतवणूकीत 4 पट होते.

संकल्पना:

चक्रवाढ व्याजाची संकल्पना.

वापरलेले सूत्र:

रक्कम = P × (1 + R/100)T

जेथे, P = मुद्दल, R = दर, T = मुदत

हिशोब:

समजा मुद्दल  = रु. P

⇒ 3 वर्षांनंतरची रक्कम = 4 P

प्रश्नानुसार,

4P = P × (1 + R/100)3

⇒ (1 + R/100)= 4    ----(i)

आता,

A = 16 P, वेळ = T  (समजा)

⇒ 16P = P × (1 + R/100)T

⇒ (1 + R/100)= 16 = 42

समीकरणावरून (i):

(1 + R/100)= (1 + R/100)6

⇒ T = 6

∴  रक्कम 6 वर्षांत 16 पट  होईल.

छोटी ट्रिक

चक्रवाढ व्याज असल्यास:
 
जर बेरीज ‘टी’ वर्षात ‘x’ पट झाली:
 
हे ‘2 टी’ वर्षात ‘x 2’ पट होईल.
 
हे ‘3 टी’ वर्षात ‘x 3’ पट होईल आणि यासारख्या.
 
जेव्हा चक्रवाढ व्याजामध्ये 3 वर्षांच्या गुंतवणूकीची रक्कम 4 पट होते तेव्हा ते 6 (= 2 ×) वर्षांमध्ये 16 (= 42) पट होईल.
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