Question

In how many years will a sum of ₹4200 amount to ₹5082 at 7% per annum simple interest?​

Answer 1

Answer:

S. I. - 5082-4200= Rs. 882

$s.i. = \frac{time \times rate \times principal}{100} \\ \\ = 882 = \frac{t \times 7 \times 4200}{100} \\ \\ = t = \frac{882 \times 100}{7 \times 4200} \\ \\ = t = \frac{882}{294} \\ \\ = t = 3years$

So, time = 3years

Answer 2

Answer:

Simple Interest =Amount-Principal= 5082-4200= Rs. 882

$simple \: interest = \frac{time \times rate \times principal}{100} \\ \\ = 882 = \frac{t \times 7 \times 4200}{100} \\ \\ = t = \frac{882 \times 100}{7 \times 4200} \\ \\ = t = \frac{882}{42 \times 7} \\ \\ = t = \frac{882}{294} \\ \\ = t = 3$

So, time = 3years