Question

at what rate percent will a sum of rupees 64000 be compounded to rupees 68921 in 3 years​

Answer 1

68921 = 64000(1 +r/100)3

(I+r/100) 3 = 68921 / 64 ooo

(1+r/100) = 3v68921 / 64000=41/40

I+r/100=41/40

r/100=41/40-I=1 / 40

r=100/40=2.5%