Question

at what rate of simple a principal become double in 10 years?

Answer 1

Answer:

10% p.a.

Step-by-step explanation:

let the principal be x

so S.I. will be also x so that amount (principal + s.i. = x+x = 2x) will be double as principal (x)

let the rate of s.i. be r

S.I. = prt/100  

x = x * r * 10/100

x = x*r/10

x/x = r/10

1 = r/10

r = 10