Question

what sum will amount to 1292 in 3 years at 12% per annum simple interest

Answer 1

let the principal be X

atq X + (x×3×12)/100 = 1292
=X+9x/25= 1292
= 34x/25=1292
X= 1292×25/34
x= 38×25
= Rs950

Answer 2

Answer:

Let us assume the required sum as ₹100

Principal = ₹100

Rate = 12%p.a

Time = 3years

SI = $\frac{P×R×T}{100}$

SI = $\frac{100×12×3}{100}$ = ₹36

Amount of ₹100 = ₹(100+36) = 136

If amount is ₹136 then the sum = ₹100

If amount is ₹1 then the sum

= $\frac{100}{136}$

If the amount is ₹1292, then sum

= ₹ $\frac{100}{136}$ × 1292

= ₹950

Hence, the required sum is ₹950