Total cost = deposit + instalment amount × number of instalments
total interest=1187.50*6
I = (P x T x R) /100
We know that, R = (100 x S.I) / (P x T)
Now I gives, S.I = Rs. 4000.
II gives, T = 4 years.
But, P is unknown. So, we cannot find R.
So, given data is insufficient to get R.
Let the rate be R% p.a.
I gives, P = Rs. 8000 and T = 4 years.
II gives, S.I = Rs. (8800 - 8000) = Rs. 800.
R = [100 x S.I] / [p x t ]= (100 x 800)/(8000 x 4) = 2 ½ % p.a
Thus, I and II both are needed to get the answer.
P = 68000, R = % & T = 9 months (3/4 years)
Flat rate = 12%
n = 4 × 4
= 16
Effective rate =2n/(n+1) × flat rate
I = prt = [15000 × 0.07 × (214/365) ]=615.52
Future value, S = P + I = $15 000 + $615.52 = $15 615.52
t=I/pr
Suppose the merchant will take advantage of the cash discount of 4% of $20 000 = $800 by paying the bill within 30 days from the date of invoice. He needs to borrow $20 000 = $800 = $19 200. He would borrow this money on day 30 and repay it on day 100 (the day the original invoice is due) resulting in a 70-day loan. The interest he should be willing to pay on borrowed money should not exceed the cash discount $800.
r=I/pt=21.73%
The highest simple interest rate at which the merchant can afford to borrow money is 21.73%. This is a break-even rate. If he can borrow money, say at a rate of 15%, he should do so. He would borrow $19 200 for 70 days at 15%. Maturity value of the loan is $19 200(1+0.15(70/365))=$19 752.33
savings would be $20 000 ? $19 752.33 = $247.67
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