In how many years, Tk. 150 will produce the same interest @ 8% as Tk. 800 produce in 3 years @ (9/2)% ?
Solution
Correct Answer: Option C
Here
P =Tk.800,
r = 9/2%.
n = 3 years
∴S.I.= Tk.(800 × 9 × 3)/(2 × 100)
= Tk.108
Now,
S.I.= Tk.108
P = Tk.150,
r = 8% = 8/100
We know
I = Pnr
n = I/Pr
= 108/(150 × 8/100)
= (100 × 108)/(150 × 8)
= 9 years
P =Tk.800,
r = 9/2%.
n = 3 years
∴S.I.= Tk.(800 × 9 × 3)/(2 × 100)
= Tk.108
Now,
S.I.= Tk.108
P = Tk.150,
r = 8% = 8/100
We know
I = Pnr
n = I/Pr
= 108/(150 × 8/100)
= (100 × 108)/(150 × 8)
= 9 years
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