By investing Rs. 5000 a "baniya" gets Rs. 390 as an interest. How much does he invest at 7 % interest if the other
part is invested at 9 % interest?
(a) Rs. 2500
(b) Rs. 3000
(c) Rs. 2000
(d) Rs. 2800
Answers
Answered by
0
Answer:
3000
Step-by-step explanation:
Applying the Simple Interest Formula,
(P*R*T)/100= 390
(5000*R*1)/100= 390 (since, time is bot mentioned, we take it as 1 yr)
Therefore, R= 7.8%
by applying the allegation method,
(9-7.8)/(7.8-7.0)
= 3/2
since we need to find the investment of 7%,
(5000*⅗)
= 3000
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