1
A = P + I
2
\mathrm{I}=\frac{\mathrm{P}\times\mathrm{t}\times\mathrm{r}}{100}
FORMULA CHAPTER
Chapter 02 – Simple Interest
WBBSEClass 10Mathematics2 formulas
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Amount under Simple Interest
A = P + I
SymbolMeaningUnit
Aamount₹
Pprincipal₹
Isimple interest₹
Worked example
Question: Given P = ₹5,000, I = ₹600, use Amount under Simple Interest to determine the required result.
Calculation: Apply the Amount under Simple Interest relation.
Step 1: Substitute the given values.
Step 2: A = 5,000 + 600.
Answer: A = ₹5,600.
Simple Interest Formula
\mathrm{I}=\frac{\mathrm{P}\times\mathrm{t}\times\mathrm{r}}{100}
SymbolMeaningUnit
Isimple interest₹
Pprincipal₹
ttimeyear
rrate of interest%
Worked example
Question: Given P = ₹5,000, t = 2 years, r = 6%, use Simple Interest Formula to determine the required result.
Calculation: Apply the Simple Interest Formula relation.
Step 1: Substitute the given values.
Step 2: I = 5000×2×6/100.
Answer: I = ₹600.