Question

25. Find the rate per cent
annum, when principal = Rs.
400, SI = Rs. 60 and Time = 4 yr.​

Answer 1

Step-by-step explanation:

SOLUTION:

Given :

Principal (P) = Rs 400

Rate of Interest (R) = 5% per annum

Time (T) = 3 years

To be found :

Simple Interest (S.I) and Amount (A)

So,

\bf Simple\:\:Interest = \frac{P\times R \times T}{100}SimpleInterest=

100

P×R×T

\bf Simple\:\:Interest = \frac{400\times 5 \times 3}{100}SimpleInterest=

100

400×5×3

\bf Simple\:\:Interest =60SimpleInterest=60

We got Simple Interest (S.I) = Rs 60

Now

Amount (A) = Simple Interest (S.I) + Principal (P)

Amount (A) = Rs 60 + Rs 400

Amount (A) = Rs 460

Hence,

Simple Interest (S.I) = Rs 60

Amount (A) = Rs 460