find the rate at which rupees 4000 will give rupees 630.50 as compound

1.	find the rate at which rupees 4000 will give rupees 630.50 as compound interest in 9 month interest being compounded quarterly
Answer» Answer: 20% Step-by-step EXPLANATION: Given, P = RS. 4000, n = 9 months = 34yr and CI= RS. 630. AMOUNT = P + CI = 4000 + 630.50 = rs. 4630.50 According to the formula, Amount = P(1+R100×4)4n => 4630.50=4000(1+R400)4×3/4 => 4630.50=4000(400+R400)3 => 4630.504000=(400+R400)3 => 92618000=(400+R400)3 => (2120)3=(400+R400)3 => 400+R400=2120 => 400+R=21×20=420 R=420-400=20%

find the rate at which rupees 4000 will give rupees 630.50 as compound interest in 9 month interest being compounded quarterly

Answer»

Answer:

20%

Step-by-step EXPLANATION:

Given, P = RS. 4000, n = 9 months = 34yr

and CI= RS. 630.

AMOUNT = P + CI = 4000 + 630.50 = rs. 4630.50

According to the formula,

Amount = P(1+R100×4)4n

=> 4630.50=4000(1+R400)4×3/4

=> 4630.50=4000(400+R400)3

=> 4630.504000=(400+R400)3

=> 92618000=(400+R400)3

=> (2120)3=(400+R400)3

=> 400+R400=2120

=> 400+R=21×20=420

R=420-400=20%