The simple interest on a sum
of money will be Rs. 150 after 4
years. In the next 4 years prin-
cipal becomes 5 times, what
will be the total interest at the
end of the 8th year?
Answers
Answered by
4
Answer:
900
Step-by-step explanation:
I=150
T=4
let P=P
R=?
I=PTR
150=P×4×R
75/2P=R
Next 4 years
P=5P
I=PTR
I=5P×4×75/2P
I=750
Total interest = 150+750
900
Answered by
31
Given :
- The simple interest on a sum of money will be Rs. 150 after 4 years.
- In the next 4 years principal becomes 5 times.
To find :
- The total interest at the end of the 8th year?
Solution :
• Let's consider the original rate be r.
We know that,
- I = P × T × R/100
→ 150 = P × R × 4/100
→ 150 × 100 = P × R × 4
→ P × R = 15000/4
→ P × R = 3750
⠀⠀━━━━━━━━━━━━━━━━━━━⠀
« Now, Finding S.I of those 4 years, when principal becomes 5 times of S.I,
→ 5P × 4 × 75/2P
Cancelling P,
→ 20 × 75/2
→ 10 × 75
→ 750
∴ Hence, The total interest is 750 + 150 I.e 900.
⠀⠀━━━━━━━━━━━━━━━━━━━⠀
⠀⠀⠀⠀⠀★ More to know :
- S.I = P × T × R/100
- If t isn't in years convert months to fraction or decimal.
- Principal is the amount of money invested.
- Intrest is percentage.
- Time must be expressed same as rate percent.
- To find amount use the formula, A = P(1 + Rt)
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