Question

A man invested Rs.20000 at 12p.c.p.a., Rs.30000 at 10p.c.p.a., and some money at 15 p.c.p.a. If the total interest received is Rs.6900. Find the money invested at 15p.c.p.a?​

Answer 1

$\huge \bf \underline \blue{answer}$

•Amount = Rs.[20000(1+10100)2(1+20100)]

•=Rs.(20000×1110×1110×65)

•=Rs.29040C.I.

•= Rs.(29040−20000)

•=Rs.9040

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