Question

the simple interest on a some for 5 year which is 2/5 of the sum find out the rate percent per annum ?​

Answer 1

Let the sum be X

Given,

SI- 2*x/5

T- 5 y

Then,

R= SI ×100/P×T

= 2x/5*100/X*5

(x will cut 2x's x,;5 will cut 100 then it will be 20&then another 5will cut 20 then it will be 4,Hence 4*2 will be 8)

Hence ,rate will be 8%p.a