Question

in how much time will a sum of money double itself at 20% per annum simple interest

Answer 1

let P = P
A = 2P

S.I. = A- P
= P
R = 15% per annum.
T = 100 × S.I. / P × 2O
= 100 × P / P × 20
= 5 Years (ans)

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Answer 2

Answer:

let principal be x

rate=20 %

amount =2x

simple interest =2x-x =x

SI = P*R*T/100

x= x*20*T/100

x= T x/5

5x = Tx

T = 5x/x

T= 5

Time = 5 years

Step-by-step explanation:

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