Question

वह राशि ज्ञात करो जिस पर 10% वार्षिक दर से 3 वर्ष का चक्रवृद्धि ब्याज 331
रु० हो, जबकि ब्याज का संयोजन वार्षिक होता है।​

Answer 1

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GIVEN THAT:-

$&#10144$ The compound interest is 331 rs of a amout with 10% rate and time is 3 year

FORMULA

$&#10140 \: \: A = P {(1 + \frac{r}{100}) }^{t}$

where,

A = compound interest

p = initial amount

r = rate

t = time

SOLUTIONS

$&#10144$ Given A = 331, r = 10% , t = 3 year

$\implies \: \: 331 = P {(1 + \frac{\cancel{10}}{10\cancel0}) }^{3} \\ \\ \implies \: \: 331 = P {(1 + \frac{1}{10}) }^{3} \: \: \: \\ \\ \implies \: \: 331 = P { (\frac{11}{10}) }^{3} \: \: \: \: \: \: \: \: \: \: \\ \\ \implies \: \:P = \frac{331 \times 1000}{1331} \: \: \: \: \: \\ \\ \implies \: \: P \: = 248.64 \: \: \: \: \: \: \: \: \: \: \: \: \:$