30 , 000 रुपये की राशि पर 7 % वार्षिक दर से निश्चित समय के लिए चक्रवृद्धि ब्याज 4 , 347 रुपये है | वह समय है -

Options

A. 3 years
B. 13 years
C. 8 years
D. 2.5 years

Answer

c

Explanation

(c) Principal =Rs. 30,000
CI= Rs. 4347,
By using fromula,
`rArr (30,000 + 4347)= 30,00(1+(7)/(100))^(t)`
`34347 = 30,000(1+(7)/(100))^(t)`
`rArr (34347)/(30,000)=((107)/(100))^(t)`
`rArr (11449)/(10000)= ((107)/(100))^(t)`
`((107)/(100))^(2)= ((107)/(100))^(t)`
`rArr t = 2 "years"`