Question

A person promises to double the principal sum invested by you in 4 years. The rate of simple interest offered by him is

(a) 10%

(b) 25

(c) 20%

(d) depends on the principal​

Answer 1

Answer:

B) 25%

Step-by-step explanation:

Answer 2

Answer:

25%

Step-by-step explanation:

Formula for calculating simple interest is given by

$S.I =\frac{ P\, \times rate\times t}{100}$

Since, principal sum(P) is getting doubled so,

S.I = $P_{f}-P_i$= 2P -P =P

$\implies P = \frac{P \times r \times 4}{100} \\\implies r = 25$

so, Rate of simple interest will be 25%.