वह राशि बताइए जो दो वर्ष बाद 10% की चक्रवृद्धि ब्याज दर पर ₹ 2420 हो जाए।

Options

A. Rs. 2000
B. Rs. 2500
C. Rs. 1000
D. Rs. 1500

Answer

a

Explanation

(a) Let the principal (मूलधन)=Rs. 100
According to the question
Rate `= 10%= (1)/(10)`

Interest (ब्याज)= 21
Principal (‌मूलधन) = 100
Amount (‌मिश्रधन) = 21 + 100 =121
121 unit ………2420
1 units ...............`(2420)/(121)`
100 units ........`(2420)/(121) xx 100 = 2,000`
`therefore` Principal (‌मूलधन) = Rs. 2000