Question

FIND THE PRINCIPAL IF IT'S INTEREST IS 3 MONTHS WITH 5.5 PER ANNUM IS RS.66

Answer 1

SI =PNR÷100. 66=P*1&5.5÷100*4. 66*100*8÷11. =1200.
so principle is Rs 1200

Answer 2

Simple Interest = Principal * Years * Rate of interest/100

S.I = PNR/100
$= 66 = \frac{p \times 5.5}{100} \times \frac{3}{12} \\ = \frac{66 \times 100 \times 12}{5.5 \times 3} \\ = \frac{66 \times 100 \times 12 \times 10}{55 \times 3} \\ = 6 \times 20 \times 4 \times 10 \\ = 120 \times 40 \\ = 4800$Rs