Question

if a sum of money becomes Rs 915 in 8 years at 11 by 4 % p.a . find the sum of money?​

Answer 1

Answer:

Rs.75

Step-by-step explanation:

Amount (A) = Rs.915

Let the principal be P.

Simple Interest (SI) = Rs.(915-P)

Rate (R) = 11/4 %

Time (T) = 8 years

SI = PRT/100

915 - P = P × 11/4 × 8 × 1/100

915 - P = P × 11/50

50 (915 - P) = 11P

4575 - 50P = 11P

4575 = 11P + 50P

4575 = 61P

P = 4575 ÷ 61

P = 75

Hence, the sum is Rs.75

Answer 2

Answer:

Answer = 698

Step-by-step explanation:

Sum in 3 yrs = 815

Sum in 4 yrs= 854

Interest for 1 yr= 854–815=39

Now for 3 yrs total interest= 39*3=117

So sum = 815–117=698