Question

please solve these questions as soon as possible
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Answer 1

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Q.1) $12000 is invested for one and half years at

$12000 is invested for one and half years atcompound interest. If R15972 is received at the end of this period. Find the rate of interest per annum.

soluction ➭

R ➭ 21%

R ➭ 20.64 %

explanation:

Let say rate of interest = R

Interest for 1st Year = 12000 × R × 1/100 ➭ 120 R

Amount after 1 years ➭ 12000 + 120R

interest for next 1/2 years ➭ (12000 +

120R) ➭ (1/2) R/100

➭ (120 + 1.2R)R/2

➭ 60R+ 0.6R²

120 R +60R+ 0.6R² ➭ 15972 - 12000

➭ 0.6R² + 180R=3972

➭ R² + 300R = 6620

➭ R² + 300R - 6620 = 0

➭ R= 20.64 %

But if We calculate

Amount ➭ P(1 + R/100)"

➭ 15972 ➭ 12000 (1 + R/100)^(3/2)

➭ 1.331 ➭ (1 + R/100)^(3/2)

➭ 1.1 ➭ (1 + R/100)

➭ 1.21 ➭ 1+ R/100

➭ R/100 ➭ 0.21

➭ R ➭21%

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hope it was helpful to you

Answer 2

Answer:

here's ur answer is ...

by the way Solly