Question

11. Find the time in which a sum of money gets doubled at the interest rate of 8% per annum.​

Answer 1

Answer:

let the principal be 100 , than amount will 2× 100 = 200

and si = a-p = 100

and r = 8% p.a.

so ,

si = prt/100

100 = 100×8×t/100

100×100/800 = t

t = 10000/800 = 12.5 years

hope it helps