Question

only maths genius can answer these questions ​

Answer 1

Answer:

Oh really...okay sir we are not genius...

Answer 2

Here, Principal (P) = Rs. 56,000, Simple Interest (S.I.) = Rs. 280, Time (T) = 2 years

Simple Interest = $\frac{P\times R\times T}{1100$

$\Rightarrow\ 280=\frac{56000\times R\times2}{100}\Rightarrow R=\frac{280\times100}{56000\times2}$

$\Rightarrow\ R\ =\ 0.25\%⇒ R = 0.25%$

Hence, the rate of interest on sum is 0.25%.

••••••••••••••••••••••••••••••••••••

Here, Principal (P) = Rs. 4500, Rate (R) = 10% p.a., Time (T) = 3 years

Simple Interest =$\frac{P\times R\times T}{100}=\frac{4500\times10\times3}{100}=Rs.\ 1350$

Now, Amount = Principal + Simple Interest

= 4500 + 1350

= Rs. 5850