Question

if a sum of money at simple interest becomes 4 times in five years then in how many years will it become 10 times​

Answer 1

Case 1:

Principal (P) = 1 ,

Amount (A) = 4P= 4 × 1 = 4

Simple Interest (I) = A - P  

Case 2:

Principal (P) = 1 ,

Rate of interest (R) = 60% , [From (1) ]

Amount (A) = 10P = 10 × 1 = 10,

Simple Interest (I) = A - P  

Therefore.,

in 15 years the sum become

10 times

#hopeithelps