Question

Rs 1200 yields Rs 144 in 2 years.find rate per cent per annum

Answer 1

Given→

Principal amount( P ) is rs 1200

Time period ( t ) is 2 years

Interest is rs 144 .

To find→

Rate percentage per annum .

Solution→

We know that formula for Simple interest is -

$si \: = \frac{prt}{100}$

Here we have to find rate ( r )

So for it formula will be -

$rate \: \: = \frac{si \: \times 100}{pt}$

$= > \frac{144 \times 100}{1200 \times 2}$

$= > \frac{144}{12 \times 2}$

$= > \frac{72}{12}$

Rate. =>. 6 %

Answer 2

rate percent=6

Step-by-step explanation:

equation to find simple interest

I=pnr by 100

I=144

p=1200

n=2

take r=a

144= 1200×2×a by 100

144= 12 × 2 × a

= 24a

a= 144÷ 24=6%