Compound interest practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
An amount is said to double in 5 years with compound interest. How many years will it take for the amount to grow to 8 times its original value?
चक्रवृद्धि ब्याज पर कोई राशि 5 वर्षों में दोगुनी हो जाती है।
उसी राशि को अपने मूल मूल्य का 8 गुना होने में कितने वर्ष लगेंगे?
Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answerसही उत्तर
A. 15 yearsA. 15 वर्ष
Explanationव्याख्या
The amount doubles every 5 years.
We need the amount to become 8 times.
8 = 2³ Therefore, three doubling periods are required.
Required time:
राशि प्रत्येक 5 वर्षों में दोगुनी होती है।
हमें राशि को 8 गुना करना है।
अतः राशि को तीन बार दोगुना होना होगा।
आवश्यक समय: = 3 × 5 = 15 years Hence, the correct answer is 15 years.
अतः सही उत्तर 15 वर्ष है।
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