Question

Pls Solve this question

1) The S.I. on a certain sum of money for 2 years at 14% per annum is ₹ 2100.Find the compound interest on the sum.

2)At what rate percent compound interest per annum will ₹ 640 amount to ₹774.40 in 2 years.

3) At what rate percent per annum will a sum of ₹2000 amount to ₹ 2205 in 2 years, compounded annually?​

Answer 1

Answer:please mark me as brainliest

Step-by-step explanation:

1.Rs-588

2.10 %

3.Let the rate be R,

Amount=Rs 2205

Principal=Rs 2000

Time=2 years

∴We know,

A=P(1+R/100)∧2

2205=2000(1+R/100)∧2

2205/2000=(1+R/100)∧2

(21/20)∧2=(1+R/1000)∧2    

21/20=1+R/100             [∵The power are cancelled]

(21/20)-1=R/100

1/20=R/100

R=(1/20)*100

R=5%

Answer 2

Step-by-step explanation:

1.Rs-588

2.10 %

3.Let the rate be R,

Amount=Rs 2205

Principal=Rs 2000

Time=2 years

∴We know,

A=P(1+R/100)∧2

2205=2000(1+R/100)∧2

2205/2000=(1+R/100)∧2

(21/20)∧2=(1+R/1000)∧2    

21/20=1+R/100             [∵The power are cancelled]

(21/20)-1=R/100

1/20=R/100

R=(1/20)*100

R=5%

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