Question

Q.47 In how much time sum of money
becomes 4 times at 12% Simple Interest?​

Answer 1

Answer:

25%

Step-by-step explanation:

Let Certain Sum be Rs 100

Given that,

Time = 10 years

and

Amount Would 4 times

Hence,

Amount = 100×4 = Rs 400

Simple Interest = Amount - Principal

S.I = Rs 400 - Rs 100

\underline{\boxed{S.I =\:Rs\:300}}

S.I=Rs300

Now,

\sf \: Rate = \dfrac{S.I \times 100}{P \times \: T }Rate=

P×T

S.I×100

\sf \: Rate = \cancel \dfrac{300 \times 100} { 100 \times 12}Rate=

100×12

300×100

\sf \: Rate = \dfrac{300}{12}Rate=

12

300

\underline{\boxed{Rate\:=25\: \%}}

Rate=25%