A sum of money becomes doubles in 3 years at compound interest, compounded annually at the same rate. In how many years it will become 4 times of itself...? Mcqs

A sum of money becomes doubles in 3 years at compound interest, compounded annually at the same rate. In how many years it will become 4 times of itself...?

(A) 5 years

(B) 6 years

(C) 7.5 years

(D) 12 years