Question

find the simple interest and the amount​

Answer 1

$s.i = \frac{p \times r \times t}{100} \\ \\ = \geqslant \frac{57600 \times 13 \times 21}{100 \times 4 \times 2} \\ \\ = \geqslant \frac{576 \times 13 \times 21}{8} = 72 \times 13 \times 21 \\ \\ = \geqslant 19656 \\ \\ = \geqslant amount \: = s.i \: + \: principal \\ \\ = \geqslant 19656 + 57600 \\ \\ = \geqslant 77256$

Answer 2

Answer:

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