Question

find the principal if rate=2% s.i.=20 and time= 20 months

Answer 1

Si = p×r×t/100
20 = p×2×5/600
20×60p=p×2×5
1200/2=p×5
600=p×5
600/5=p
P=30

Answer 2

so
$first$
si = p×r×t/100
so
20 = p× 2× 20/18 / 100
20 = p × 1× 2 / 95
by cross multiple
95×20/2 =p
950= p
ans