Question

at what rate will interest on Rs 300 be Rs 120 for 5 years​

Answer 1

Answer:

Step-by-step explanation:

⇒  S.I. for 2 years = Rs. 720.

⇒  S.I. for 7 years = Rs. 1020

∴   S.I. for 5 years = Rs. 1020− Rs. 720= Rs. 300.

⇒  S.I. for 2 years =  

5

300

​  

×2=Rs.120

⇒  Principal=720−120=Rs.600

∴  The sum is Rs.600.

Step-by-step explanation:

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Answer 2

Answer:

Rate = 8%

Step-by-step explanation:

$\frac{PTR}{100}=Interest\\R = Interest * \frac{100}{PT}$

Principle P = 300

Interest = 120

Time T = 5

Therefore, Rate = $120*\frac{100}{300*5}$