Question

3200 at 7whole1/2% per annum for 3whole1/2​

Answer 1

Step-by-step explanation:

$p = 3200 \: \\ r \: = 7\frac{1}{2}\% = \frac{15}{2}\% \\ t = 3 \frac{1}{2} years = \frac{7}{2} years\\ amount = principal + simple \: interest \\ amount = 3200 + \frac{p \times r \times t}{100} \\ = 3200 + \frac{3200 \times 15 \times 7}{100 \times 2 \times 2} \\ = 3200 + \frac{3200 \times 105}{400} \\ = 3200 + (8 \times 105) \\ = 3200 + 840 = 4040 \: rupees$

so amount =4040₹ and simple interest = 840 ₹