Question

6. In
7. In how many years will a sum become triple of itself at the rate of 12% p.a.?
of itself in 4 years at a certain rate of interest. Find the rate of interest.
8
8. A sum of money becomes
5​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Simple Interest SI=

100

PNR

Given, AmountA=3P

=>P+SI=3P

=>P+

100

P×3×R

=3

=>R=

3

200

%

Now,

For , AmountA=9P

=>P+SI=9P

=>P+

100

P×N×

3

200

=9P=> 3

2N=8

=>N=12 years