Question

Simple interest for an amount is Rs. 120 at 6% per annum for two years. What is the amount, if the simple interest is Rs. 90 at the same rate of interest for 3 years?

Answer 1

90=1000×3×r/100

90=30×r

90/30=r

r=3%

Answer 2

There will be Rs. 1080 for 3 years.

Step-by-step explanation:

Since we have given that

Simple interest = Rs. 120

Rate = 6%

Time = 2 years

So, We will use the formula to find principal.

So, it becomes,

$120=\dfrac{P\times 6\times 2}{100}\\\\12000=12P\\\\Rs.\ 1000=P$

So, if interest = Rs. 90

Time = 3 years

Rate = 6% p.a.

So, it becomes,

$SI=\dfrac{1000\times 6\times 3}{100}\\\\SI=180$

So, Amount = Principal + Interest

Amount = 1000+180

Amount = Rs. 1080.

Hence, there will be Rs. 1080 for 3 years.

# learn more:

find the simple interest and amount

Principal = 1,280, Time = 2 years, Rate of Interest = 22%

Simple Interest =

, Amount =​

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