Question

in what time will rs 1200 amount to rs 1536 at 3.5%per year

Answer 1

Let time be t.
P= Rs 1200
A= Rs 1536
r= 3.5% p.a.
t= t years
SI = A-P
= 1536-1200
= Rs 336

SI= (P×r×t)/100
=》336=(1200×3.5×t)/100
=》336=12×3.5×t (cancelling the zeros)
=》336=42×t
=》t=336/42
=》t=8

. ' . The time = 8 years.