Question

answer the second one​

Answer 1

Step-by-step explanation:

Question :-

Calculate the sum on which interest for 1½ years at 3½ % per annum is ₹257

Given :-

Principal = ₹257

Time = 1½ years or 3/2 years

Rate % = 3½ % or 7/2 %

So,

Simple Interest =

$\frac{p \times r \times t}{100}$

$\frac{257 \times \frac{3}{2} \times \frac{7}{2} }{100}$

$\frac{ \frac{5397}{4} }{100}$

$\frac{5397}{400}$

$13.49$

Now,

Sum of money or Amount = Simple Interest + Principal

$13.49 + 257$

$270.49$

Hence,

The sum of money = ₹ 270.49