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A sum invested at 8% p.a. amounts to Rs ...

A sum invested at 8% p.a. amounts to Rs 20280 at the end of one year, when the interest is compounded half yearly. What will be the simple interest on the same sum for `4 3/5` years at double the earlier rate of interest?
8% प्रति वर्ष की दर से निवेश की गयी कोई राशि पहले वर्ष के अंत में 20280 रुपये हो जाती है, जब ब्याज की चक्रवृद्धि अर्धवार्षिक है | इस राशि पर पहले की तुलना में ब्याज की दोगुनी दर से `4 3/5` वर्षों का साधारण ब्याज क्या होगा ?

A

Rs 13500

B

Rs 13800

C

Rs 14200

D

Rs 14500

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