Question

Please answer the question......​

Answer 1

$Amount =3550 \\ time = \: 4 \\ rate = 10\frac{1}{2}$
$Amount =3550 \\ rate = 10\frac{1}{2} = \frac{21}{2} \\ using \: \: \: \: this \: \: \: formula \: \\ principal \: = \frac{100}{100 + (rate \times time)} \times amount \\ \frac{100}{100 + (4 \times \frac{21}{2} )} \times 3550 \\ \frac{100}{100 + 42} \times 3550 \\ \frac{100}{142} \times 3550 \\ \frac{50}{71} \times 3550 \\ 50 \times 50 = 2500 \: principal$