Question

the the simple interest on a certain sum at 5% per annum for 3 years and 4 years differ by 82. find the sum​

Answer 1

Answer:

Rs.840

Description for Correct answer:

Note=SI for every year will be same.

∴Simple interest for 3 years=3×5=15%

Simple interest for 4 years=4×5=20%

Difference in interest

=(20−15)=5%

According to question,

5% of sum=42

Sum=425×100=Rs.840

Answer 2

Answer:

your answer 840

Step-by-step explanation:

PTR/100= S.I

So, P*4*5/100 - P*3*5/100 = 42

or, 20P -15P/100 = 42

or, 5p = 42*100

or, 5p = 4200

or, p = 4200/5

or, p = 840