Question

what principal will earn an intrest of ₹500 at 3½% per annum in 8 years?​

Answer 1

Step-by-step explanation:

We have, P = Principal = ₹ 600, R = Rate percent per annum = 2%

And T = Time = 20 months = year

Therefore, simple interest (S.I.)

How do you Calculate Simple Interest 4

Thus S.I. = ₹ 20.

Answer 2

Remainder=1000–(200+400+250)=150

Total interest=3.85% of 1000=38.5rs.

Let interest on remaining 150rs be x % .

(3% of 200) + (3.5% of 400) + (5% of 250) + (x % of 150)= 38.5

=> 6 + 14 + 12.5 + x/100 × 150 = 38.5

=> 32.5 + 1.5x = 38.5

=> 1.5x = 38.5–32.5

=> 1.5x = 6

=> X = 6/1.5

=> X = 4

Hence the interest on the remaining 150rs is 4%.